Various changes

- add release build
- control framerate
- fix bug that caused camera to shake
- enable double-buffering and VSync

src/game.h

@@ -1,6 +1,7 @@
 #pragma once
 
 #include <stdbool.h>
+#include <stdint.h>
 #include "SDL2/SDL.h"
 #include "cglm/cglm.h"
 #include "camera.h"
@@ -20,6 +21,7 @@ typedef struct
 typedef struct
 {
 	bool running;
+	uint64_t previousTicks;
 	InputState input;
 	SDL_Window *window;
 	SDL_GLContext *glContext;