+ added simulation.h and vector.h struct

- removed Vec2f

KKK/game/src/main.cpp

@@ -31,7 +31,7 @@ public:
 
 int main(int argc, const char *argv[]) {
   MainWindow window(500, 500);
-  window.setmaxfps(60);
+  window.set_maxfps(60.0);
   window.loop();
   window.stop();
 }

KKK/game/src/simulation.cpp

@@ -0,0 +1,2 @@
+#include <include/simulation.h>
+