It is a really cool concept and a good game. My only critique is that it really needs some background music. Not the occasional jingle that plays when you get an answer right, but actual music- it is super annoying otherwise. I always have the sound off. Also it takes a very long time to refill the energy meter. I wish it were faster. 4 minutes for 1 energy is wayyy to long. Besides that it is a very cool game.