Usually if you’re transferring the game to the MAKERbuino using the included RS232-Adapter, the game stays on the memory of your MAKERbuino. This means if you power it off and back on again, the MAKERbuino should load the game back up. This is because it is the latest flashed program. But the game is not saved to the SD Card.
This depends on how your game is set up. If you’re using the title screen function (gamebuino. titleScreen) you can return to the game loading screen using the C-button in the title screen. But you’ll need to implement a function to return to the title screen within your game code.
If you haven’t set up a such function within your game code you’ll need to use the c-button trick.