diff --git a/src/platform/android/app/src/main/cpp/main.cpp b/src/platform/android/app/src/main/cpp/main.cpp
index 28138ed..3804c15 100644
--- a/src/platform/android/app/src/main/cpp/main.cpp
+++ b/src/platform/android/app/src/main/cpp/main.cpp
@@ -12,15 +12,17 @@
 
 time_t startTime;
 
-int getTime() {
+int osGetTime() {
     timeval t;
     gettimeofday(&t, NULL);
     return int((t.tv_sec - startTime) * 1000 + t.tv_usec / 1000);
 }
 
-extern "C" {
+bool osSave(const char *name, const void *data, int size) {
+    return false;
+}
 
-int lastTime;
+extern "C" {
 
 char Stream::cacheDir[255];
 char Stream::contentDir[255];
@@ -49,8 +51,6 @@ JNI_METHOD(void, nativeInit)(JNIEnv* env, jobject obj, jstring contentDir, jstri
     env->ReleaseStringUTFChars(cacheDir, str);
 
     Game::init();
-
-    lastTime = getTime();
 }
 
 JNI_METHOD(void, nativeFree)(JNIEnv* env) {
@@ -62,11 +62,7 @@ JNI_METHOD(void, nativeReset)(JNIEnv* env) {
 }
 
 JNI_METHOD(void, nativeUpdate)(JNIEnv* env) {
-    int time = getTime();
-    if (time == lastTime)
-        return;
-    Game::update((time - lastTime) * 0.001f);
-    lastTime = time;
+    Game::update();
 }
 
 JNI_METHOD(void, nativeRender)(JNIEnv* env) {
diff --git a/src/platform/ios/ViewController.mm b/src/platform/ios/ViewController.mm
index be1d253..3667a35 100644
--- a/src/platform/ios/ViewController.mm
+++ b/src/platform/ios/ViewController.mm
@@ -19,9 +19,7 @@
 char Stream::cacheDir[255];
 char Stream::contentDir[255];
 
-int lastTime;
-
-int getTime() {
+int osGetTime() {
     const int64_t kOneMillion = 1000 * 1000;
     static mach_timebase_info_data_t info;
 
@@ -31,6 +29,10 @@ int getTime() {
     return (int)((mach_absolute_time() * info.numer) / (kOneMillion * info.denom));
 }
 
+bool osSave(const char *name, const void *data, int size) {
+    return false;
+}
+
 #define SND_BUF_SIZE 8192
 
 static AudioQueueRef audioQueue;
@@ -115,8 +117,6 @@ void soundInit() {
 
     soundInit();
     Input::reset();
-
-    lastTime = getTime() - 1;
 }
 
 - (void)viewDidUnload {	
@@ -139,12 +139,7 @@ void soundInit() {
     Core::width  = self.view.bounds.size.width * scale;
     Core::height = self.view.bounds.size.height * scale;
 
-    int time = getTime();
-    if (time == lastTime)
-        return;
-    Game::update((time - lastTime) * 0.001f);
-    lastTime = time;
-
+    Game::update();
 	Game::render();
 }
 
diff --git a/src/platform/nix/main.cpp b/src/platform/nix/main.cpp
index 9dc6702..4fca2d4 100644
--- a/src/platform/nix/main.cpp
+++ b/src/platform/nix/main.cpp
@@ -14,12 +14,20 @@
 // Time
 unsigned int startTime;
 
-int getTime() {
+int osGetTime() {
     timeval t;
     gettimeofday(&t, NULL);
     return int((t.tv_sec - startTime) * 1000 + t.tv_usec / 1000);
 }
 
+bool osSave(const char *name, const void *data, int size) {
+    FILE *f = fopen(name, "wb");
+    if (!f) return false;
+    fwrite(data, size, 1, f);
+    fclose(f);
+    return true;
+}
+
 // Sound
 #define SND_FRAME_SIZE  4
 #define SND_DATA_SIZE   (1024 * SND_FRAME_SIZE)
@@ -206,8 +214,6 @@ int main(int argc, char **argv) {
     sndInit();
     Game::init(argc > 1 ? argv[1] : NULL);
 
-    int lastTime = getTime();
-
     while (1) {
         if (XPending(dpy)) {
             XEvent event;
@@ -216,17 +222,13 @@ int main(int argc, char **argv) {
                 break;
             WndProc(event,dpy,wnd);
         } else {
-            int time = getTime();
-            if (time <= lastTime)
-                continue;
-
             pthread_mutex_lock(&sndMutex);
-            Game::update((time - lastTime) * 0.001f);
+			bool updated = Game::update();
             pthread_mutex_unlock(&sndMutex);
-            lastTime = time;
-
-            Game::render();
-            glXSwapBuffers(dpy, wnd);
+            if (updated) {
+				Game::render();
+				glXSwapBuffers(dpy, wnd);
+			}
         }
     };
 
diff --git a/src/platform/osx/main.cpp b/src/platform/osx/main.cpp
index 849a529..939a9af 100644
--- a/src/platform/osx/main.cpp
+++ b/src/platform/osx/main.cpp
@@ -138,12 +138,16 @@ OSStatus eventHandler(EventHandlerCallRef handler, EventRef event, void* userDat
     return CallNextEventHandler(handler, event);
 }
 
-int getTime() {
+int osGetTime() {
     UInt64 t;
     Microseconds((UnsignedWide*)&t);
     return int(t / 1000);
 }
 
+bool osSave(const char *name, const void *data, int size) {
+    return false;
+}
+
 char Stream::contentDir[255];
 char Stream::cacheDir[255];
 
@@ -197,17 +201,9 @@ int main() {
     SelectWindow(window);
     ShowWindow(window);
 
-    int lastTime = getTime(), fpsTime = lastTime + 1000, fps = 0;
-
     EventRecord event;
     while (!isQuit)
-        if (!GetNextEvent(0xffff, &event)) {
-            int time = getTime();
-            if (time <= lastTime)
-                continue;
-            Game::update((time - lastTime) * 0.001f);
-            lastTime = time;
-
+        if (!GetNextEvent(0xffff, &event) && Game::update()) {
             Game::render();
             aglSwapBuffers(context);
         }
diff --git a/src/platform/rpi/main.cpp b/src/platform/rpi/main.cpp
index d664f8d..cf6389d 100644
--- a/src/platform/rpi/main.cpp
+++ b/src/platform/rpi/main.cpp
@@ -18,12 +18,20 @@
 // Time
 unsigned int startTime;
 
-int getTime() {
+int osGetTime() {
     timeval t;
     gettimeofday(&t, NULL);
     return int((t.tv_sec - startTime) * 1000 + t.tv_usec / 1000);
 }
 
+bool osSave(const char *name, const void *data, int size) {
+    FILE *f = fopen(name, "wb");
+    if (!f) return false;
+    fwrite(data, size, 1, f);
+    fclose(f);
+    return true;
+}
+
 // Sound
 snd_pcm_uframes_t   SND_FRAMES = 512;
 snd_pcm_t           *sndOut;
@@ -466,22 +474,16 @@ int main(int argc, char **argv) {
 
     inputInit(); // initialize and grab input devices
 
-    int lastTime = getTime();
-
     while (!Input::down[ikEscape]) {
         inputUpdate();
 
-        int time = getTime();
-        if (time <= lastTime)
-            continue;
-
         pthread_mutex_lock(&sndMutex);
-        Game::update((time - lastTime) * 0.001f);
+        bool updated = Game::update();
         pthread_mutex_unlock(&sndMutex);
-        lastTime = time;
-
-        Game::render();
-        eglSwapBuffers(display, surface);
+		if (updated) {
+			Game::render();
+			eglSwapBuffers(display, surface);
+		}
     };
 
     sndFree();