Game state is now preserved in a file

game.c

@@ -176,6 +176,11 @@ void reset_board(GameState_t *state) {
     state->board[y][x] = (rand() % 10 == 0) ? 4 : 2; // 10% chance to spawn a 4
     tile_count++;
   }
+  FILE *f = fopen("save.dat", "wb");
+  if (f) {
+    fwrite(state, sizeof(GameState_t), 1, f);
+    fclose(f);
+  }
 }
 
 bool spawn_tile(GameState_t *state) {