[Fix] Forgot to push the matrix stack.

src/main.c

@@ -40,7 +40,7 @@ int main(int argc, const char** argv) {
       switch(event.type) {
       case SDL_KEYDOWN:
         switch(event.key.keysym.sym) {
-          case SDLK_q:
+          case SDLK_ESCAPE:
             quit = 1;
             break;
           case SDLK_a:

src/opengl.c

@@ -175,6 +175,7 @@ void gl_free(gl_texture* texture) {
 // Blit the sprite at given position.
 void gl_blitSprite(gl_texture* sprite, Vec2* pos, const int sx, const int sy) {
   glMatrixMode(GL_TEXTURE);
+  glPushMatrix();
   glTranslatef(sprite->sw * (FP)(sx)/sprite->rw,
         sprite->sh*(sprite->sy-(FP)sy-1)/sprite->rh, 0.0f);