diff --git a/scripts/base.js b/scripts/base.js
index 1663ea0..7ce0be5 100644
--- a/scripts/base.js
+++ b/scripts/base.js
@@ -62,6 +62,18 @@ Object.dainty_assign = function(target, source)
   }
 }
 
+Object.isObject = function(o)
+{
+  return (typeof o === 'object' && !Array.isArray(o));
+}
+
+Object.setter_assign = function(target, source)
+{
+  for (var key in target)
+    if (Object.isAccessor(target,key) && typeof source[key] !== 'undefined')
+      target[key] = source[key];
+}
+
 Object.containingKey = function(obj, prop)
 {
   if (typeof obj !== 'object') return undefined;
@@ -822,6 +834,16 @@ function bb_expand(oldbb, x) {
   return bb;
 };
 
+function bl2bb(bl, wh)
+{
+  return {
+    b: bl.y,
+    l: bl.x,
+    r: bl.x + wh.x,
+    t: bl.y + wh.y
+  };
+}
+
 function bb_from_objects(objs) {
   var bb = objs[0].boundingbox;
   objs.forEach(function(obj) { bb = bb_expand(bb, obj.boundingbox); });
diff --git a/scripts/components.js b/scripts/components.js
index 10f1f05..94640eb 100644
--- a/scripts/components.js
+++ b/scripts/components.js
@@ -22,40 +22,9 @@ var component = {
   extend(spec) {
     return Object.copy(this, spec);
   },
-
-  /* Given a relative path, return the full path */
-  resani(path) {
-    if (!this.gameobject) return path;
-    if (path[0] === '/') return path.slice(1);
-    var res = this.gameobject.ur.toString();
-    res = res.replaceAll('.', '/');
-    var restry = res + "/" + path;
-    while (!IO.exists(restry)) {
-      res = res.updir() + "/";
-      if (res === "/")
-        return path;
-
-      restry = res + path;
-    }
-    return restry;
-  },
-
-  /* Given the full path, return the most relative path */
-  resavi(path) {
-    if (!this.gameobject) return path;
-    if (path[0] === '/') return path;
-
-    var res = this.gameobject.ur.toString();
-    res = res.replaceAll('.', '/');
-    var dir = path.dir();
-    if (res.startsWith(dir))
-      return path.base();
-    
-    return path;
-  },
 };
 
-component.sprite = {
+component.sprite = Object.copy(component, {
   pos:[0,0],
   color:[1,1,1],
   layer:0,
@@ -63,20 +32,25 @@ component.sprite = {
   path: "",
   toString() { return "sprite"; },
   make(go) {
-    var nsprite = Object.create(component.sprite.maker);
+    var nsprite = Object.create(this);
     nsprite.gameobject = go;
-    Object.assign(nsprite, make_sprite(go.body));    
-    nsprite.ur = this;
+    Object.assign(nsprite, make_sprite(go.body)); 
+    Object.complete_assign(nsprite, component.sprite.impl);
+    for (var p in component.sprite.impl)
+      if (typeof this[p] !== 'undefined') {
+        Log.warn(`setting ${p}`);
+        nsprite[p] = this[p];
+      }
     return nsprite;
   },
-};
+});
 
-component.sprite.maker = Object.copy(component, {
+component.sprite.impl = {
   set path(x) {
-    cmd(12,this.id,this.resani(x),this.rect);
+    cmd(12,this.id,prototypes.resani(this.gameobject.ur, x),this.rect);
   },
   get path() {
-    return this.resavi(cmd(116,this.id));
+    return prototypes.resavi(this.gameobject.ur, cmd(116,this.id));
   },
   hide() { this.enabled = false; },
   show() { this.enabled = true; },
@@ -105,11 +79,11 @@ component.sprite.maker = Object.copy(component, {
   dimensions() { return cmd(64,this.path); },
   width() { return cmd(64,this.path).x; },
   height() { return cmd(64,this.path).y; },
-});
+};
 
 Object.freeze(sprite);
 
-var sprite = component.sprite.maker;
+var sprite = component.sprite;
 
 sprite.inputs = {};
 sprite.inputs.kp9 = function() { this.pos = [0,0]; };
@@ -707,15 +681,21 @@ bucket.inputs.rb.doc = "Rotate the points CW.";
 bucket.inputs.rb.rep = true;
 
 component.circle2d = Object.copy(collider2d, {
-  set radius(x) { cmd_circle2d(0,this.id,x); },
-  get radius() { return cmd_circle2d(2,this.id); },
+  impl: {
+    set radius(x) { cmd_circle2d(0,this.id,x); },
+    get radius() { return cmd_circle2d(2,this.id); },
 
-  set scale(x) { this.radius = x; },
-  get scale() { return this.radius; },
-
-  set offset(x) { cmd_circle2d(1,this.id,x); },
-  get offset() { return cmd_circle2d(3,this.id); },
+    set scale(x) { Log.warn(x);this.radius = x; },
+    get scale() { return this.radius; },
 
+    set offset(x) { cmd_circle2d(1,this.id,x); },
+    get offset() { return cmd_circle2d(3,this.id); },
+  },
+  
+  radius:10,
+  offset:[0,0],
+  toString() { return "circle2d"; },
+  
   boundingbox() {
     var diameter = this.radius*2*this.gameobject.scale;
     return cwh2bb(this.offset.scale(this.gameobject.scale), [this.radius,this.radius]);
@@ -725,22 +705,10 @@ component.circle2d = Object.copy(collider2d, {
     var circle = Object.create(this);
     circle.gameobject = go;
     Object.assign(circle, make_circle2d(go.body));
+    Object.complete_assign(circle,this.impl);
     
     return circle;
   },
-
-  gui() {
-    Nuke.newline();
-    Nuke.label("circle2d");
-    this.radius = Nuke.pprop("Radius", this.radius);
-    this.offset = Nuke.pprop("offset", this.offset);
-  },
-
-  ur: {
-    radius:10,
-    offset:[0,0],
-    toString() { return "circle2d"; },
-  },
 });
 
 /* ASSETS */
diff --git a/scripts/editor.js b/scripts/editor.js
index f0dbeb2..8ead122 100644
--- a/scripts/editor.js
+++ b/scripts/editor.js
@@ -420,7 +420,7 @@ var editor = {
     GUI.text("$$$$$$", [0,ypos],1,lvlcolor);
 
     this.selectlist.forEach(function(x) {
-      var sname = x.ur.toString();
+      var sname = x.__proto__.toString();
       if (!x.level_obj().empty)
         x.dirty = true;
       else
@@ -1231,6 +1231,7 @@ editor.inputs.s = function() {
   
   if (editor.sel_comp) {
     if (!('scale' in editor.sel_comp)) return;
+    Log.warn(`scaling ${editor.sel_comp.toString()}`);
     editor.scalelist.push({
       obj: editor.sel_comp,
       scale: editor.sel_comp.scale,
@@ -1257,19 +1258,23 @@ var inputpanel = {
   value: "",
   on: false,
   stolen: {},
-  
+  pos:[100,Window.height-50],
+  wh:[350,600],
+  anchor: [0,1],
+
   gui() {
-    this.guibody();
+    var win = Mum.window({width:this.wh.x,height:this.wh.y, color:Color.black.alpha(0.1), anchor:this.anchor});
+    var itms = this.guibody();
+    if (!Array.isArray(itms)) itms = [itms];
+    win.items = itms;
+    win.draw(this.pos.slice());
   },
   
   guibody() {
-    this.value = Nuke.textbox(this.value);
-    
-    Nuke.newline(2);
-    if (Nuke.button("submit")) {
-      this.submit();
-      return true;
-    }
+    return [
+      Mum.text({str:this.value, color:Color.green}),
+      Mum.button({str:"Submit", action:this.submit})
+    ];
   },
   
   open(steal) {
@@ -1313,6 +1318,8 @@ var inputpanel = {
   submit_check() { return true; },
 
   keycb() {},
+
+  caret: 0,
   
   input_backspace_pressrep() {
     this.value = this.value.slice(0,-1);
@@ -1321,13 +1328,24 @@ var inputpanel = {
 };
 
 inputpanel.inputs = {};
-inputpanel.inputs.char = function(c) { this.value += c; this.keycb(); }
+inputpanel.inputs.char = function(c) {
+  this.value = this.value.slice(0,this.caret) + c + this.value.slice(this.caret);
+  this.caret++;
+  Log.warn(this.caret);
+  this.keycb();
+}
+inputpanel.inputs['C-d'] = function() { this.value = this.value.slice(0,this.caret) + this.value.slice(this.caret+1); };
 inputpanel.inputs.tab = function() { this.value = tab_complete(this.value, this.assets); }
 inputpanel.inputs.escape = function() { this.close(); }
-inputpanel.inputs.backspace = function() { this.value = this.value.slice(0,-1); this.keycb(); };
+inputpanel.inputs.backspace = function() {
+  this.value = this.value.slice(0,this.caret-1) + this.value.slice(this.caret);
+  this.caret--;
+  this.keycb();
+};
 inputpanel.inputs.backspace.rep = true;
 inputpanel.inputs.enter = function() { this.submit(); }
 
+
 function proto_count_lvls(name)
 {
   if (!this.occs) this.occs = {};
@@ -1376,21 +1394,25 @@ load("scripts/textedit.js");
 var replpanel = Object.copy(inputpanel, {
   title: "REPL",
   closeonsubmit:false,
+  wh: [700,300],
+  pos: [50,50],
+  anchor: [0,0],
+
   guibody() {
-    cmd(141);
-    var w = 700;
-    var h = 300;
-    var p = [50,50];
     var log = cmd(84);
-    GUI.window(p, [w,h], Color.black.alpha(0.1));
-    GUI.scissor(p.x,p.y,w,h);
-    GUI.text(log, p.add([0,10]), 1, Color.white, w, [0,0]);
-    GUI.text(this.value, p, 1, Color.green, w);
-    cmd(141);
-    GUI.scissor(0,0,Window.width, Window.height);
+    log = log.slice(-500);
+    
+    return [
+      Mum.text({str:log, anchor:[0,0], offset:[0,-300]}),
+      Mum.text({str:this.value,color:Color.green, offset:[0,-290], caret: this.caret})
+    ];
   },
+  prevmark:-1,
+  prevthis:[],
 
   action() {
+    if (!this.value) return;
+    this.prevthis.unshift(this.value);
     var ecode = "";
     var repl_obj = (editor.selectlist.length === 1) ? editor.selectlist[0] : editor.edit_level;
     ecode += `var $ = repl_obj.objects;`;
@@ -1400,11 +1422,31 @@ var replpanel = Object.copy(inputpanel, {
     ecode += this.value;
     Log.say(this.value);
     this.value = "";
+    this.caret = 0;
     var ret = function() {return eval(ecode);}.call(repl_obj);
-    Log.say(ret);
+    if (ret)
+      Log.say(ret);
   },
 });
 
+replpanel.inputs = Object.create(inputpanel.inputs);
+replpanel.inputs['C-p'] = function()
+{
+  if (this.prevmark >= this.prevthis.length) return;
+  this.prevmark++;
+  this.value = this.prevthis[this.prevmark];
+}
+
+replpanel.inputs['C-n'] = function()
+{
+  this.prevmark--;
+  if (this.prevmark < 0) {
+    this.prevmark = -1;
+    this.value = "";
+  } else
+    this.value = this.prevthis[this.prevmark];
+}
+
 var objectexplorer = Object.copy(inputpanel, {
   title: "object explorer",
   obj: undefined,
@@ -1601,7 +1643,9 @@ var openlevelpanel = Object.copy(inputpanel,  {
   },
   
   guibody() {
-    Mum.column({items:Object.values(this.mumlist)}).draw([100,100]);
+    var a = [Mum.text({str:this.value,color:Color.green})];
+    var b = a.concat(Object.values(this.mumlist));
+    return Mum.column({items:b});
   },
 });
 
@@ -1804,3 +1848,6 @@ Game.stop();
 Game.editor_mode(true);
 
 load("editorconfig.js");
+
+Log.warn(ur.ball);
+Log.warn(ur['ball.big']);
diff --git a/scripts/engine.js b/scripts/engine.js
index b84aac3..8e95ebd 100644
--- a/scripts/engine.js
+++ b/scripts/engine.js
@@ -690,8 +690,8 @@ Register.update.register(Game.exec, Game);
 load("scripts/entity.js");
 
 var preprimum = {};
-preprimum.objects = [];
-var World = gameobject.make(gameobject.ur, preprimum);
+preprimum.objects = {};
+var World = gameobject.make(preprimum);
 var Primum = World;
 Primum.level = undefined;
 Primum.toString = function() { return "Primum"; };
diff --git a/scripts/entity.js b/scripts/entity.js
index 5ee170f..95aef7b 100644
--- a/scripts/entity.js
+++ b/scripts/entity.js
@@ -11,102 +11,7 @@ function grab_from_points(pos, points, slop) {
 };
 
 var gameobject = {
-  
-  layer_nuke() {
-    Nuke.label("Collision layer");
-    Nuke.newline(Collision.num);
-    for (var i = 0; i < Collision.num; i++)
-      this.layer = Nuke.radio(i, this.layer, i);
-  },
-
-  draw_layer: 1,
-  draw_layer_nuke() {
-    Nuke.label("Draw layer");
-    Nuke.newline(5);
-    for (var i = 0; i < 5; i++)
-      this.draw_layer = Nuke.radio(i, this.draw_layer, i);
-  },
-
-  hide() { this.components.forEach(function(x) { x.hide(); }); this.objects.forEach(function(x) { x.hide(); }); },
-  show() { this.components.forEach(function(x) { x.show(); }); this.objects.forEach(function(x) { x.show(); }); },
-
-  phys_nuke() {
-    Nuke.newline(1);
-    Nuke.label("phys");
-    Nuke.newline(3);
-    this.phys = Nuke.radio("dynamic", this.phys, 0);
-    this.phys = Nuke.radio("kinematic", this.phys, 1);
-    this.phys = Nuke.radio("static", this.phys, 2);
-  },
-  
-  set_center(pos) {
-    var change = pos.sub(this.pos);
-    this.pos = pos;
-    
-    for (var key in this.components) {
-      this.components[key].finish_center(change);
-    }
-  },
-
-  get_relangle() {
-    if (!this.level) return this.angle;
-    return this.angle - this.level.angle;
-  },
-
-  width() {
-    var bb = this.boundingbox();
-    return bb.r - bb.l;
-  },
-
-  height() {
-    var bb = this.boundingbox();
-    return bb.t-bb.b;
-  },
-
-  /* Make a unique object the same as its prototype */
-  revert() {
-//    var t = this.transform();
-    Object.totalmerge(this,this.ur);
-//    Object.merge(this,t);
-  },
-
-  gui() {
-    var go_guis = walk_up_get_prop(this, 'go_gui');
-    Nuke.newline();
-
-    go_guis.forEach(function(x) { x.call(this); }, this);
-
-    for (var key in this) {
-      if (typeof this[key] === 'object' && 'gui' in this[key]) this[key].gui();
-    }
-  },
-
-  check_registers(obj) {
-    Register.unregister_obj(this);
-  
-    if (typeof obj.update === 'function')
-      Register.update.register(obj.update, obj);
-
-    if (typeof obj.physupdate === 'function')
-      Register.physupdate.register(obj.physupdate, obj);
-
-    if (typeof obj.collide === 'function')
-      obj.register_hit(obj.collide, obj);
-
-    if (typeof obj.separate === 'function')
-      obj.register_separate(obj.separate, obj);
-
-    if (typeof obj.draw === 'function')
-      Register.draw.register(obj.draw,obj);
-
-    if (typeof obj.debug === 'function')
-      Register.debug.register(obj.debug, obj);
-
-    obj.components.forEach(function(x) {
-      if (typeof x.collide === 'function')
-        register_collide(1, x.collide, x, obj.body, x.shape);
-    });
-  },
+  impl: {
       get scale() { return cmd(103, this.body); },
       set scale(x) {
 	var pct = x/this.scale;
@@ -141,12 +46,34 @@ var gameobject = {
 	},this);	
       },
       
-      set pos(x) { this.set_worldpos(Vector.rotate(x, Math.deg2rad(this.level.angle)).add(this.level.worldpos())); },
+      set pos(x) {
+        this.set_worldpos(x); return;
+        this.set_worldpos(Vector.rotate(x,Math.deg2rad(this.level.angle)).add(this.level.worldpos()));
+      },
       get pos() {
         var offset = this.worldpos().sub(this.level.worldpos());
 	return Vector.rotate(offset, -Math.deg2rad(this.level.angle));
       },
+      get elasticity() { return cmd(107,this.body); },
+      set elasticity(x) { cmd(106,this.body,x); },
 
+      get friction() { return cmd(109,this.body); },
+      set friction(x) { cmd(108,this.body,x); },
+
+      set mass(x) { set_body(7,this.body,x); },
+      get mass() {
+        if (!(this.phys === Physics.dynamic))
+	  return this.__proto__.mass;
+	  
+        return q_body(5, this.body);
+      },
+
+      set phys(x) { set_body(1, this.body, x); },
+      get phys() { return q_body(0,this.body); },
+      get velocity() { return q_body(3, this.body); },
+      set velocity(x) { set_body(9, this.body, x); },
+      get angularvelocity() { return Math.rad2deg(q_body(4, this.body)); },
+      set angularvelocity(x) { set_body(8, this.body, Math.deg2rad(x)); },
       worldpos() { return q_body(1,this.body); },
       set_worldpos(x) {
         var diff = x.sub(this.worldpos());
@@ -170,30 +97,10 @@ var gameobject = {
         set_body(0,this.body, Math.deg2rad(x));
       },
 
-      get elasticity() { return cmd(107,this.body); },
-      set elasticity(x) { cmd(106,this.body,x); },
-
-      get friction() { return cmd(109,this.body); },
-      set friction(x) { cmd(108,this.body,x); },
-
-      set mass(x) { set_body(7,this.body,x); },
-      get mass() {
-        if (!(this.phys === Physics.dynamic))
-	  return this.ur.mass;
-	  
-        return q_body(5, this.body);
-      },
-
-      set phys(x) { set_body(1, this.body, x); },
-      get phys() { return q_body(0,this.body); },
-      get velocity() { return q_body(3, this.body); },
-      set velocity(x) { set_body(9, this.body, x); },
-      get angularvelocity() { return Math.rad2deg(q_body(4, this.body)); },
-      set angularvelocity(x) { set_body(8, this.body, Math.deg2rad(x)); },
       
       pulse(vec) { set_body(4, this.body, vec);},
 
-      push(vec) { set_body(12,this.body,vec);},
+      shove(vec) { set_body(12,this.body,vec);},
       world2this(pos) { return cmd(70, this.body, pos); },
       this2world(pos) { return cmd(71, this.body,pos); },
       set layer(x) { cmd(75,this.body,x); },
@@ -201,11 +108,6 @@ var gameobject = {
       alive() { return this.body >= 0; },
       in_air() { return q_body(7, this.body);},
       on_ground() { return !this.in_air(); },
-
-      disable() { this.components.forEach(function(x) { x.disable(); });},
-      enable() { this.components.forEach(function(x) { x.enable(); });},
-      sync() { },
-
       spawn(ur) {
 	if (typeof ur === 'string')
 	  ur = prototypes.get_ur(ur);
@@ -214,9 +116,103 @@ var gameobject = {
 	  return undefined;
 	}
 	
-	var go = gameobject.make(ur, this);
+	var go = ur.make(this);
         return go;
       },
+      
+  reparent(parent) {
+    if (this.level === parent)
+      this.level.remove_obj(this);
+      
+    var name = parent.objects.push(this);
+    this.toString = function() { return name; };
+    
+    if (this.level)
+      this.level.objects.remove(this);
+    this.level = parent;
+  },
+   remove_obj(obj) {
+     delete this[obj.toString()];     
+     this.objects.remove(obj);
+   },
+      
+  },
+  
+  draw_layer: 1,
+  components: [],
+  objects: [],
+  level: undefined,
+
+  hide() { this.components.forEach(function(x) { x.hide(); }); this.objects.forEach(function(x) { x.hide(); }); },
+  show() { this.components.forEach(function(x) { x.show(); }); this.objects.forEach(function(x) { x.show(); }); },
+
+  get_relangle() {
+    if (!this.level) return this.angle;
+    return this.angle - this.level.angle;
+  },
+
+  width() {
+    var bb = this.boundingbox();
+    return bb.r - bb.l;
+  },
+
+  height() {
+    var bb = this.boundingbox();
+    return bb.t-bb.b;
+  },
+
+  /* Make a unique object the same as its prototype */
+  revert() {
+    Object.totalmerge(this,this.__proto__);
+  },
+
+  check_registers(obj) {
+    Register.unregister_obj(obj);
+  
+    if (typeof obj.update === 'function')
+      Register.update.register(obj.update, obj);
+
+    if (typeof obj.physupdate === 'function')
+      Register.physupdate.register(obj.physupdate, obj);
+
+    if (typeof obj.collide === 'function')
+      obj.register_hit(obj.collide, obj);
+
+    if (typeof obj.separate === 'function')
+      obj.register_separate(obj.separate, obj);
+
+    if (typeof obj.draw === 'function')
+      Register.draw.register(obj.draw,obj);
+
+    if (typeof obj.debug === 'function')
+      Register.debug.register(obj.debug, obj);
+
+    obj.components.forEach(function(x) {
+      if (typeof x.collide === 'function')
+        register_collide(1, x.collide, x, obj.body, x.shape);
+    });
+  },
+    pos: [0,0],
+    angle:0,
+    phys:1,
+    flipx:false,
+    flipy:false,
+    scale:1,
+    elasticity:0.5,
+    friction:1,
+    mass:1,
+    velocity:[0,0],
+    angularvelocity:0,
+    layer:0,
+    save:true,
+    selectable:true,
+    ed_locked:false,
+    
+
+      disable() { this.components.forEach(function(x) { x.disable(); });},
+      enable() { this.components.forEach(function(x) { x.enable(); });},
+      sync() { },
+
 
       /* Bounding box of the object in world dimensions */
       boundingbox() {
@@ -294,9 +290,10 @@ var gameobject = {
 	if (ret.empty) return undefined;
 	return ret;
       },
-
+      
       json_obj() {
-	var ur = gameobject.diff(this,this.ur);
+	var ur = gameobject.diff(this,this.__proto__);
+        
         return ur ? ur : {};
       },
 
@@ -309,8 +306,8 @@ var gameobject = {
       level_obj() {
         var json = this.json_obj();
 	var objects = {};
-	this.ur.objects ??= {};
-	if (!Object.keys(this.objects).equal(Object.keys(this.ur.objects))) {
+	this.__proto__.objects ??= {};
+	if (!Object.keys(this.objects).equal(Object.keys(this.__proto__.objects))) {
 	  for (var o in this.objects) {
 	    objects[o] = this.objects[o].transform_obj();
 	    objects[o].ur = this.objects[o].ur.toString();
@@ -318,7 +315,7 @@ var gameobject = {
 	} else {
 	  for (var o in this.objects) {
 	    var obj = this.objects[o].json_obj();
-	    Object.assign(obj, gameobject.diff(this.objects[o].transform(), this.ur.objects[o]));
+	    Object.assign(obj, gameobject.diff(this.objects[o].transform(), this.__proto__.objects[o]));
 	    if (!obj.empty)
 	      objects[o] = obj;
 	  }
@@ -361,7 +358,7 @@ var gameobject = {
      },
 
       dup(diff) {
-        var n = this.level.spawn(this.ur);
+        var n = this.level.spawn(this.__proto__);
 	Object.totalmerge(n, this.make_ur());
 	return n;
       },
@@ -380,6 +377,7 @@ var gameobject = {
 
 	  Player.uncontrol(this);
 	  Register.unregister_obj(this);
+	  this.instances.remove(this);
 
 	  this.body = -1;
 	  for (var key in this.components) {
@@ -395,76 +393,62 @@ var gameobject = {
 //	});
       },
 
-   remove_obj(obj) {
-     delete this[obj.toString()];     
-     this.objects.remove(obj);
-   },
-
       up() { return [0,1].rotate(Math.deg2rad(this.angle));},
       down() { return [0,-1].rotate(Math.deg2rad(this.angle));},
       right() { return [1,0].rotate(Math.deg2rad(this.angle));},
       left() { return [-1,0].rotate(Math.deg2rad(this.angle));},
-  reparent(parent) {
-    if (this.level === parent)
-      this.level.remove_obj(this);
-    var name = parent.objects.push(this);
-    this.toString = function() { return name; };
-    
-    if (this.level)
-      this.level.objects.remove(this);
-    this.level = parent;
-  },
-
-  make(ur, level) {
+  instances: [],
+  make(level) {
     level ??= Primum;
-    var obj = Object.create(gameobject);
+    var obj = Object.create(this);
+    this.instances.push(obj);
     obj.body = make_gameobject();
     obj.components = {};
     obj.objects = {};
+    Object.complete_assign(obj, gameobject.impl);
     Object.hide(obj, 'components');
     Object.hide(obj, 'objects');
-    obj.toString = function() { return obj.ur.toString(); };
+    obj.toJSON = gameobject.level_json;
     
     Game.register_obj(obj);
 
     cmd(113, obj.body, obj); // set the internal obj reference to this obj
 
-    obj.ur = ur;
-
     obj.reparent(level);
 
-    for (var prop in ur) {
-      var p = ur[prop];
+    for (var prop in this) {
+      var p = this[prop];
       if (typeof p !== 'object') continue;
 
       if ('ur' in p) {
         obj[prop] = obj.spawn(prototypes.get_ur(p.ur));
 	obj.rename_obj(obj[prop].toString(), prop);
       } else if ('comp' in p) {
-        obj[prop] = component[p.comp].make(obj);
+        Log.warn(p);
+        obj[prop] = Object.assign(component[p.comp].make(obj), p);
 	obj.components[prop] = obj[prop];
       }
     };
 
-    if (ur.objects) {
-      for (var prop in ur.objects) {
-        var o = ur.objects[prop];
+    if (this.objects) {
+      for (var prop in this.objects) {
+        Log.warn(this.objects[prop]);
+	continue;
+        var o = this.objects[prop];
         var newobj = obj.spawn(prototypes.get_ur(o.ur));
 	if (!newobj) continue;
 	obj.rename_obj(newobj.toString(), prop);
       }
     }
 
-    var save_tostr = obj.toString;
-    Object.totalmerge(obj,ur);
-    obj.toString = save_tostr;
-    obj.components.forEach(function(x) { if ('sync' in x) x.sync(); });
-    obj.check_registers(obj);
+    for (var p in this.impl) {
+      if (Object.isAccessor(this.impl, p))
+        obj[p] = this[p];
+    }
+
+    obj.components.forEach(function(x) { if ('sync' in x) x.sync(); });
+    gameobject.check_registers(obj);
 
-    obj.objects.forEach(function(x) {
-      x.ur = prototypes.get_ur(x.ur);
-    });
-    
     if (typeof obj.start === 'function') obj.start();
 
     return obj;
@@ -501,26 +485,7 @@ var gameobject = {
   },
 }
 
-gameobject.toJSON = gameobject.level_obj;
-
-gameobject.spawn.doc = `Spawn an entity of type 'ur' on this entity. Returns the spawned entity.`;
-
-gameobject.ur = {
-//  pos: [0,0],
-  scale:1,
-  flipx:false,
-  flipy:false,
-//  angle:0,
-  elasticity:0.5,
-  friction:1,
-  mass:1,
-//  velocity:[0,0],
-//  angularvelocity:0,
-  layer: 0,
-  save: true,
-  selectable: true,
-  ed_locked: false,
-};
+gameobject.impl.spawn.doc = `Spawn an entity of type 'ur' on this entity. Returns the spawned entity.`;
 
 /* Default objects */
 var prototypes = {};
@@ -560,7 +525,7 @@ prototypes.from_file = function(file)
     return prototypes.get_ur(urpath);
   }
     
-  var upperur = gameobject.ur;
+  var upperur = gameobject;
   
   if (path.length > 1) {
     var upperpath = path.slice(0,-1);
@@ -571,7 +536,8 @@ prototypes.from_file = function(file)
     }
   }
 
-  var newur = Object.create(upperur);
+  var newur = {};//Object.create(upperur);
+  
   file = file.replaceAll('.','/');
 
   var jsfile = prototypes.get_ur_file(urpath, ".js");
@@ -594,8 +560,16 @@ prototypes.from_file = function(file)
   json ??= {};
   Object.merge(newur,json);
 
+  for (var p in newur)
+    if (Object.isObject(newur[p]) && Object.isObject(upperur[p]))
+      newur[p].__proto__ = upperur[p];
+      
+  newur.__proto__ = upperur;
+  newur.instances = [];
+
   prototypes.list.push(urpath);
   newur.toString = function() { return urpath; };
+  newur.ur = urpath;
   ur[urpath] = newur;
 
   return ur[urpath];
@@ -605,7 +579,7 @@ prototypes.list = [];
 
 prototypes.from_obj = function(name, obj)
 {
-  var newur = Object.copy(gameobject.ur, obj);
+  var newur = Object.copy(gameobject, obj);
   prototypes.ur[name] = newur;
   newur.toString = function() { return name; };
   return prototypes.ur[name];
@@ -715,3 +689,36 @@ prototypes.from_obj("camera2d", {
 });
 
 prototypes.from_obj("arena", {});
+
+prototypes.resavi = function(ur, path)
+{
+    if (!ur) return path;
+    if (path[0] === '/') return path;
+
+    var res = ur.replaceAll('.', '/');
+    var dir = path.dir();
+    if (res.startsWith(dir))
+      return path.base();
+    
+    return path;
+}
+
+prototypes.resani = function(ur, path)
+{
+  if (!path) return "";
+  Log.warn(`Sanitizing ${path} from ${ur}`);
+    if (!ur) return path;
+    if (path[0] === '/') return path.slice(1);
+
+    var res = ur.replaceAll('.', '/');
+    var restry = res + "/" + path;
+    while (!IO.exists(restry)) {
+      res = res.updir() + "/";
+      if (res === "/")
+        return path;
+
+      restry = res + path;
+    }
+    return restry;
+}
+
diff --git a/scripts/gui.js b/scripts/gui.js
index f7ca5a1..07deb39 100644
--- a/scripts/gui.js
+++ b/scripts/gui.js
@@ -1,10 +1,11 @@
 var GUI = {
-  text(str, pos, size, color, wrap, anchor, frame) {
+  text(str, pos, size, color, wrap, anchor, cursor) {
     size ??= 1;
     color ??= Color.white;
     wrap ??= -1;
     anchor ??= [0,1];
-    frame ??= Window.boundingbox();
+
+    cursor ??= -1;
 
     var bb = cmd(118, str, size, wrap);
     var w = bb.r*2;
@@ -18,15 +19,11 @@ var GUI = {
     p.y += h * (1 - anchor.y);
     bb.t += h*(1-anchor.y);
     bb.b += h*(1-anchor.y);
-    ui_text(str, p, size, color, wrap, bb);
+    ui_text(str, p, size, color, wrap, cursor);
 
     return bb;
   },
 
-  text_cursor(str, pos, size, cursor) {
-    cursor_text(str,pos,size,Color.white,cursor);
-  },
-
   scissor(x,y,w,h) {
     cmd(140,x,y,w,h);
   },
@@ -68,13 +65,14 @@ var GUI = {
 };
 
 var Mum = {
-    padding:[2,2], /* Each element inset with this padding on all sides */
+    padding:[0,0], /* Each element inset with this padding on all sides */
+    offset:[0,0],
     font: "fonts/LessPerfectDOSVGA.ttf",
     font_size: 1,
     text_align: "left",
     scale: 1,
     angle: 0,
-    anchor: [0,0],
+    anchor: [0,1],
     text_shadow: {
       pos: [0,0],
       color: Color.white,
@@ -93,6 +91,8 @@ var Mum = {
     return n;
   },
 
+  start() {},
+
   extend(def) {
     var n = Object.create(this);
     Object.assign(n, def);
@@ -103,22 +103,58 @@ var Mum = {
 Mum.text = Mum.extend({
   draw(cursor) {
     if (this.hide) return;
-    this.calc_bb(cursor);
-    
+    this.caret ??= -1;
+
+/*    if (!this.bb)
+      this.calc_bb(cursor);
+    else
+      this.update_bb(cursor);
+*/    
     if (this.selected) {
       Object.assign(this,this.hovered);
       this.calc_bb(cursor);
     }
-
-    var pos = cursor.sub(bb2wh(this.bb).scale(this.anchor));
-    ui_text(this.str, pos, this.font_size, this.color, this.width);
+    this.calc_bb(cursor);
+    var aa = [0,1].sub(this.anchor);
+    var pos = cursor.add(this.wh.scale(aa)).add(this.offset);
+    if (this.caret > -1) Log.warn(`Drawing box at pos ${this.caret} over letter ${this.str[this.caret-1]}`);
+    ui_text(this.str, pos, this.font_size, this.color, -1, this.width, this.caret);
   },
+  
+  update_bb(cursor) {
+    this.bb = movebb(this.bb, cursor.sub(this.wh.scale(this.anchor)));
+  },
+  
   calc_bb(cursor) {
     var bb = cmd(118,this.str, this.font_size, this.width);
-    var wh = bb2wh(bb);
-    var pos = cursor.sub(wh.scale(this.anchor));
+    this.wh = bb2wh(bb);
+    var pos = cursor.sub(this.wh.scale(this.anchor));
     this.bb = movebb(bb,pos);
   },
+  start() {
+    this.calc_bb([0,0]);
+  },
+});
+
+Mum.window = Mum.extend({
+  start() {
+    this.wh = [this.width, this.height];
+    this.bb = cwh2bb([0,0], this.wh);
+  },
+  draw(pos) {
+    var p = pos.sub(this.wh.scale(this.anchor));
+    GUI.window(p,this.wh, this.color);
+    this.bb = bl2bb(p, this.wh);
+    var pos = [this.bb.l, this.bb.t];
+    GUI.flush();
+    GUI.scissor(p.x,p.y,this.wh.x,this.wh.y);
+    this.items.forEach(function(item) {
+      if (item.hide) return;
+      item.draw(pos.slice());
+    });
+    GUI.flush();
+    GUI.scissor_win();
+  },
 });
 
 Mum.image = Mum.extend({
@@ -130,9 +166,9 @@ Mum.image = Mum.extend({
     }
 
     var tex_wh = cmd(64, this.path);
-    var wh = tex_wh.slice();
-    if (this.width !== 0) wh.x = this.width;
-    if (this.height !== 0) wh.y = this.height;
+    this.wh = tex_wh.slice();
+    if (this.width !== 0) this.wh.x = this.width;
+    if (this.height !== 0) this.wh.y = this.height;
 
     this.wh = wh.scale(this.scale);
     this.sendscale = [wh.x/tex_wh.x, wh.y/tex_wh.y];
@@ -156,9 +192,8 @@ Mum.column = Mum.extend({
     this.items.forEach(function(item) {
       if (item.hide) return;
       item.draw(cursor);
-      var wh = bb2wh(item.bb);
-      cursor.y -= wh.y*2;
-      cursor.y -= this.padding.y*2;
+      cursor.y -= item.wh.y;
+      cursor.y -= this.padding.y;
     }, this);
   },
 });
diff --git a/source/engine/ffi.c b/source/engine/ffi.c
index 4fd32f5..60b4062 100644
--- a/source/engine/ffi.c
+++ b/source/engine/ffi.c
@@ -282,26 +282,12 @@ JSValue duk_ui_text(JSContext *js, JSValueConst this, int argc, JSValueConst *ar
   float size = js2number(argv[2]);
   struct rgba c = js2color(argv[3]);
   int wrap = js2int(argv[4]);
-  struct boundingbox bb = js2bb(argv[5]);
-  JSValue ret = JS_NewInt64(js, renderText(s, pos, size, c, wrap, -1, 1.0, bb));
+  int cursor = js2int(argv[5]);
+  JSValue ret = JS_NewInt64(js, renderText(s, pos, size, c, wrap, cursor, 1.0));
   JS_FreeCString(js, s);
   return ret;
 }
 
-JSValue duk_cursor_text(JSContext *js, JSValueConst this, int argc, JSValueConst *argv) {
-  const char *s = JS_ToCString(js, argv[0]);
-  HMM_Vec2 pos = js2hmmv2(argv[1]);
-
-  float size = js2number(argv[2]);
-  struct rgba c = js2color(argv[3]);
-  int wrap = js2int(argv[5]);
-  int cursor = js2int(argv[4]);
-  struct boundingbox bb = js2bb(argv[6]);
-  renderText(s, pos, size, c, wrap, cursor, 1.0,bb);
-  JS_FreeCString(js, s);
-  return JS_NULL;
-}
-
 JSValue duk_gui_img(JSContext *js, JSValueConst this, int argc, JSValueConst *argv) {
   const char *img = JS_ToCString(js, argv[0]);
   gui_draw_img(img, js2hmmv2(argv[1]), js2hmmv2(argv[2]), js2number(argv[3]), js2bool(argv[4]), js2hmmv2(argv[5]), 1.0, js2color(argv[6]));
@@ -1636,8 +1622,7 @@ void ffi_load() {
   DUK_FUNC(register, 3)
   DUK_FUNC(register_collide, 6)
 
-  DUK_FUNC(ui_text, 5)
-  DUK_FUNC(cursor_text, 5)
+  DUK_FUNC(ui_text, 6)
   DUK_FUNC(gui_img, 10)
 
   DUK_FUNC(inflate_cpv, 3)
diff --git a/source/engine/font.c b/source/engine/font.c
index 8677ccb..d97f1c8 100644
--- a/source/engine/font.c
+++ b/source/engine/font.c
@@ -191,6 +191,7 @@ void draw_char_box(struct Character c, HMM_Vec2 cursor, float scale, struct rgba
   cpVect b;
   b.x = cursor.X;
   b.y = cursor.Y;
+  color.a = 30;
 
   draw_box(b, wh, color);
 }
@@ -210,10 +211,8 @@ void text_flush(HMM_Mat4 *proj) {
   curchar = 0;
 }
 
-static int drawcaret = 0;
-
-void sdrawCharacter(struct Character c, HMM_Vec2 cursor, float scale, struct rgba color, struct boundingbox frame) {
-  if (curchar == max_chars)
+void sdrawCharacter(struct Character c, HMM_Vec2 cursor, float scale, struct rgba color) {
+  if (curchar+1 >=  max_chars)
     return;
 
   struct text_vert vert;
@@ -278,14 +277,13 @@ struct boundingbox text_bb(const char *text, float scale, float lw, float tracki
       }
     }
   }
-  
-  return cwh2bb((HMM_Vec2){0,0}, (HMM_Vec2){cursor.X,-cursor.Y});
+
+  return cwh2bb((HMM_Vec2){0,0}, (HMM_Vec2){cursor.X,font->linegap-cursor.Y});
 }
 
 /* pos given in screen coordinates */
-int renderText(const char *text, HMM_Vec2 pos, float scale, struct rgba color, float lw, int caret, float tracking, struct boundingbox frame) {
+int renderText(const char *text, HMM_Vec2 pos, float scale, struct rgba color, float lw, int caret, float tracking) {
   int len = strlen(text);
-  drawcaret = caret;
 
   HMM_Vec2 cursor = pos;
 
@@ -295,15 +293,15 @@ int renderText(const char *text, HMM_Vec2 pos, float scale, struct rgba color, f
   struct rgba usecolor = color;
 
   while (*line != '\0') {
-    if (caret == curchar)
+    if (caret >= 0 && caret == curchar)
       draw_char_box(font->Characters[69], cursor, scale, color);
       
     if (isblank(*line)) {
-      sdrawCharacter(font->Characters[*line], cursor, scale, usecolor, frame);
+      sdrawCharacter(font->Characters[*line], cursor, scale, usecolor);
       cursor.X += font->Characters[*line].Advance * tracking * scale;
       line++;
     } else if (isspace(*line)) {
-      sdrawCharacter(font->Characters[*line], cursor, scale, usecolor, frame);
+      sdrawCharacter(font->Characters[*line], cursor, scale, usecolor);
       cursor.Y -= scale * font->linegap;
       cursor.X = pos.X;
       line++;
@@ -322,7 +320,7 @@ int renderText(const char *text, HMM_Vec2 pos, float scale, struct rgba color, f
       }
 
       while (wordstart < line) {
-        sdrawCharacter(font->Characters[*wordstart], cursor, scale, usecolor, frame);
+        sdrawCharacter(font->Characters[*wordstart], cursor, scale, usecolor);
         cursor.X += font->Characters[*wordstart].Advance * tracking * scale;
         wordstart++;
       }
diff --git a/source/engine/font.h b/source/engine/font.h
index 32b3296..c37fab0 100644
--- a/source/engine/font.h
+++ b/source/engine/font.h
@@ -31,10 +31,10 @@ struct sFont {
 
 void font_init();
 struct sFont *MakeFont(const char *fontfile, int height);
-void sdrawCharacter(struct Character c, HMM_Vec2 cursor, float scale, struct rgba color, struct boundingbox frame);
+void sdrawCharacter(struct Character c, HMM_Vec2 cursor, float scale, struct rgba color);
 void text_settype(struct sFont *font);
 struct boundingbox text_bb(const char *text, float scale, float lw, float tracking);
-int renderText(const char *text, HMM_Vec2 pos, float scale, struct rgba color, float lw, int caret, float tracking, struct boundingbox frame);
+int renderText(const char *text, HMM_Vec2 pos, float scale, struct rgba color, float lw, int caret, float tracking);
 
 // void text_frame();
 void text_flush(HMM_Mat4 *proj);