Anything but
This game is as good as shooters (especially indie shooters) get to perfection.
This is a wonderful mix of fantastically well done twin-stick shooting, and amazing all-guitar music. Have you ever crafted a supreme jazz guitar solo by blasting robots? No? Then play this game!
It's really different, innovative and like no other twin-stick shooter I've ever played. If you love music and/or twin stick shooters, you should play this, if you love fun, you should play this. If you enjoy life, and are looking for a game that's different to any game you've ever played before, this is it. It's even more incredible considering the fact that it is almost completely the work of one man.
A really pure gaming experience, with no extraneous or useless components. This is gaming at it's best, wonderful, abstract, and like no other medium out there.