Beat Hazard Ultra - twin stick shooter (can be played single stick) that uses your music as the BG track and generates the levels from it.
Freezing Birds - A twist on the usual match 3, as you have to slide the columns around to match. Not bad for a freebie.
Piyo Blocks 2 - Zookeeper/Bejeweled clone. Free again.
Retro Racing - Overhead racing game. No doubt you know about this one already.
Rogue Runner - a runner that has different vehicles etc, so you jump and shoot stuff. Nicely presented.
Don't Run With a Plasma Sword - more like Bit Trip Runner than Canabalt
Mechanic Panic - one button climber, avoid falling debris, electric shocks, rescue falling people. Really nicely presented, I really like this.
Goat Up - Possibly my favourite climber, a regular 'on the toilet' game. Climb as high as you can, kiss the Billy's, have kids and find as many unique things in the levels as you can. Classic Minter in non-violent mode.
Deflex - allegedly a chill out game, expect frustration in equal measure when you mess it up.
Minotron - Its Llamatron on iOS, how can that not be good?