A game that you can kill like 10 mins or something. I was thinking along the lines of N+, Planet Puzzle League, Space Invaders Extreme (2), etc.
WarioWare Magnetica Flips Artemis Fowl Cooking Mama Cooking Mama 2 Cooking Mama 3 Kirby Canvas Curse Top Trumps Doctor Who Electroplankton Bubble Bobble Revolution Daigasso! Band Brothers Tetris DS Those are about the only ones I can think of.
There's also Rhythm Heaven if you're into Rhythm games. Along that line, there's also Maestro Jump In Music (Did I get that title right?).
You could use some homebrews too, like Puzzle Maniak (has many games). Arcade emulators: Solomon's key, Pac-Man, Mr Do!, Green Beret, etc.
