I remembered a nice (extremely simple) game I used to play on the Atari ST, so I remade it, and got my 6 year-old daughter to make the SFXC for it. It's a quick ("coffee break") game, but there are 5 difficulty levels, full randomisation so it's a very replayable game (if, of course, you like it in the first place! :D).
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CaptainD