You need to use US/EN keyboard layout to use the arrow keys in the menu screens.
ESC key is mapped to BACKSPACE. Use this key to exit any submenu or to return to main menu when in game paused.
The game is fully optified, however, it uses libxerces27 which will take about 2Mb of your rootfs space.
Unfortunately it presents a number of issues due to Allegro library port problems:
- Full screen is not working. The screen is cut at the bottom and not centred.
- Performance is terribly slow with audio enabled.
If anyone is willing to help fixing Allegro library problems, it would not only help this game's porting, but would also open the door to a great number of games that are using this library.