1. BlockulousPlatform: Android. Price 0,99 USD
A fun 3D physics puzzler it had an addictive effect on me. You am presented with a construct of blocks that might remind you of your childhood, and you have to remove some of the blocks to get one certain stone on the top of another. For just one dollar its a steal.
2. sync lab
Platform: Various, I'm not shure I found them all. Price from free to 0,99 USD
I found the game in the Steam-Workshop for Game Maker, and loved it. You have to fill up certain spaces by cloning yourself and every clone makes the same move, which makes it quite a puzzler.
Platform: iOS and Android. Price from free to 0,99 USD
A really fast game where you have to dodge obstacles and collect some gems on the way. As simple as the gameplay is, as much fun it is.