Original idea, the rotation is part of the gameplay, it's not just rotating to rotate, you have to do it to win the game. For that kind of game that's a neat implication of the theme!
My only (small) complain would be for azerty users like me, I don't know how hard it is for you to make the arrow works as the base movement. I know the E key would be far but I prefer this than changing my layout or doing some weird movement with my fingers haha.
Not a real problem but if the next jam you can have it too, people like me would be happy I guess :D.