Group the stars up with same colour stars as they fall. Once a moon appears, join the moon with the stars of that colour to make them all disappear. This sends rocks to your opponent (human or computer). Creating chains sends loads more rocks.

There are 3 game modes included;

Standard: A normal match for who lasts the longest.
Punish: The winner keeps their current board while the loser starts again but still receives rocks left over from last time.
Trial: Try for a high score surviving as long as you can in 1 player.

Download full version here (815kB)