I picked up Qube recently on a steam sale. Pretty engaging puzzle game. However, you can't change the keybinds from qwerty, although not a huge problem (I've solved 3/4 so far with an azerty keyboard) it can be annoying.
Overall it's worth it if you're into puzzle's though. The overall difficulty is a bit hit and miss for me, with some being solved in a matter of seconds and others tedious half hour trial and error reruns. Still worth it though!
Oh, there is a fix for Azerty (
here)