diff --git a/scripts/engine.js b/scripts/engine.js
index c0ae893..0f75508 100644
--- a/scripts/engine.js
+++ b/scripts/engine.js
@@ -146,7 +146,22 @@ global.mixin("scripts/render.js");
 
 function process()
 {
-  say ('holy cow');
+  var elapsed = 0.16;
+  prosperon.appupdate(elapsed);
+  prosperon.emitters_step(elapsed).
+  if (sim.play || sim.step) {
+    var dt = 0.16;
+    prosperon.update(dt*game.timescale);
+    if (sim.mode = "step")
+      sim.pause();
+  }
+  physlag += elapsed;
+  while (physlag > physMS) {
+    physlag -= physMS;
+    prosperon.physstep(physMS*timescale);
+    prosperon.physupdate(physMS*timescale);
+  }
+  prosperon.render();
 }
 
 global.Game = {
diff --git a/source/engine/jsffi.c b/source/engine/jsffi.c
index 5b10d7c..eb110ff 100644
--- a/source/engine/jsffi.c
+++ b/source/engine/jsffi.c
@@ -3,7 +3,6 @@
 #include "script.h"
 
 #include "anim.h"
-#include "timer.h"
 #include "debug.h"
 #include "debugdraw.h"
 #include "font.h"
@@ -206,8 +205,6 @@ JSValue ptr2js(void *ptr) {
   return obj;
 }
 
-struct timer *js2timer(JSValue v) { return id2timer(js2int(v)); }
-
 double js_get_prop_number(JSValue v, const char *p) {
   double num;
   JS_ToFloat64(js, &num, js_getpropstr(v,p));
@@ -1485,6 +1482,14 @@ GETSET_GLOBAL(physMS, number)
 GETSET_GLOBAL(timescale, number)
 GETSET_GLOBAL(updateMS, number)
 
+JSValue js_emitters_step(JSContext *js, JSValue this, int argc, JSValue *argv)
+{
+  emitters_step(js2number(argv[0]));
+  return JS_UNDEFINED;
+}
+
+JSValue js_
+
 static const JSCFunctionListEntry js_prosperon_funcs[] = {
   CGETSET_ADD(global, updateMS),
   CGETSET_ADD(global, physMS),
diff --git a/source/engine/sprite.c b/source/engine/sprite.c
index 0592af1..f6193a1 100644
--- a/source/engine/sprite.c
+++ b/source/engine/sprite.c
@@ -5,7 +5,6 @@
 #include "render.h"
 #include "stb_ds.h"
 #include "texture.h"
-#include "timer.h"
 #include "HandmadeMath.h"
 
 #include "sprite.sglsl.h"
diff --git a/source/engine/timer.c b/source/engine/timer.c
deleted file mode 100644
index 2bd4043..0000000
--- a/source/engine/timer.c
+++ /dev/null
@@ -1,100 +0,0 @@
-#include "timer.h"
-#include "log.h"
-#include <stdlib.h>
-
-#include <stb_ds.h>
-#include "script.h"
-
-struct timer *timers;
-static int first = -1;
-
-void check_timer(struct timer *t, double dt) {
-  if (!t->on)
-    return;
-
-  t->remain_time -= dt;
-
-  if (t->remain_time <= 0) {
-    t->cb(t->data);
-    if (t->repeat) {
-      t->remain_time = t->interval;
-      return;
-    }
-
-    timer_pause(t);
-    return;
-  }
-}
-
-void timer_update(double dt, double scale) {
-  double sdt = dt*scale;
-  for (int i = 0; i < arrlen(timers); i++)
-    if (timers[i].app)
-      check_timer(&timers[i], dt);
-    else
-       check_timer(&timers[i], sdt);
-}
-
-int timer_make(double interval, void (*callback)(void *param), void *param, int own, int app) {
-  struct timer new;
-  new.remain_time = interval;
-  new.interval = interval;
-  new.cb = callback;
-  new.data = param;
-  new.repeat = 1;
-  new.owndata = own;
-  new.next = -1;
-  new.app = app;
-
-  if (first < 0) {
-    timer_start(&new);
-    arrput(timers, new);
-    return arrlen(timers) - 1;
-  } else {
-    int retid = first;
-    first = id2timer(first)->next;
-    *id2timer(retid) = new;
-    timer_start(id2timer(retid));
-    return retid;
-  }
-}
-
-void timer_pause(struct timer *t) {
-  if (!t->on) return;
-  t->on = 0;
-}
-
-void timer_stop(struct timer *t) {
-  if (!t->on) return;
-  t->on = 0;
-  t->remain_time = t->interval;
-}
-
-void timer_start(struct timer *t) {
-  if (t->on) return;
-  t->on = 1;
-}
-
-void timer_remove(int id) {
-  struct timer *t = id2timer(id);
-//  free_callee(t->data);
-  t->next = first;
-  t->on = 0;  
-  first = id;
-}
-
-void timerr_settime(struct timer *t, double interval) {
-  t->remain_time += (interval - t->interval);
-  t->interval = interval;
-}
-
-struct timer *id2timer(int id) {
-  return &timers[id];
-}
-
-void timers_free()
-{
-//  for (int i = 0; i < arrlen(timers); i++)
-//    if (timers[i].on)
-//      free_callee(timers[i].data);
-}
diff --git a/source/engine/timer.h b/source/engine/timer.h
deleted file mode 100644
index d4580fb..0000000
--- a/source/engine/timer.h
+++ /dev/null
@@ -1,29 +0,0 @@
-#ifndef TIMER
-#define TIMER
-
-struct timer {
-    int timerid;
-    int on;
-    
-    double interval; // Time of timer
-    int repeat;
-    double remain_time;   // How much time until the timer executes
-    void (*cb)(void *data);
-    void *data;
-    int owndata;
-    int next;
-  int app; /* True if this timer is an "app" timer, and should always update; otherwise, only update with game time */
-};
-
-int timer_make(double interval, void (*callback)(void *param), void *param, int own, int app);
-struct timer *id2timer(int id);
-void timer_remove(int id);
-void timer_start(struct timer *t);
-void timer_pause(struct timer *t);
-void timer_stop(struct timer *t);
-void timer_update(double dt, double scale);
-void timerr_settime(struct timer *t, double interval);
-
-void timers_free();
-
-#endif
diff --git a/source/engine/yugine.c b/source/engine/yugine.c
index 0921137..7e0bdbf 100644
--- a/source/engine/yugine.c
+++ b/source/engine/yugine.c
@@ -14,7 +14,6 @@
 
 #include "datastream.h"
 
-#include "timer.h"
 #include "quickjs/quickjs.h"
 
 #include "jsffi.h"
@@ -104,8 +103,6 @@ static void process_frame()
   script_call_sym(c_process_fn,0,NULL);
   double elapsed = stm_sec(stm_laptime(&frame_t));
   script_evalf("prosperon.appupdate(%g);", elapsed);
-  /* Timers all update every frame - once per monitor refresh */
-  timer_update(elapsed, timescale);
 
   emitters_step(elapsed);