Your standard Bust-a-Move action, as it should be.
I'm a long time fan of Bust-a-move (or as it's known in my country, Puzzle Bobble), and I was very dissappointed by the first game, Bust-a-move DS.
Space Bust-a-move however plays as it should do, giving the choice of D-pad controls for that much needed precision.
Music is not too memorable, but the graphics are nice enough, and the story mode is fun for introducing boss fights that aren't just 2-player CPU fights!