Nintendo's Game&Watch LCD games.
GEM ports by Rajah Lone.

Since 320*200px, 16 colors.
Use Falcon XBIOS DMA sound layer for sounds.

Use A key for GameA or B key for GameB (harder).
Play with left and right arrow.

Other keyboard shortcuts:
^I or Help: info alert.
^Q: quit program (same as close window).
^N: new game (same as A key).
P or Esc: pause or resume game.

