// Sets up the 640x400 graphics + text mode, as well as the vsync callback.
void game_init(void);

// Clears all text and fades out the graphics layer to prepare for exiting the
// game.
void game_exit(void);

// Clears all text and fades out the graphics layer to prepare for executing
// another binary. (Yes, it's effectively the same as game_exit().)
void game_switch_binary(void);