Well, I loved it, except for the position controls, they were really hard to get in hand, I think, something easier, like left arrow to go to left position, and right one to go to right would have been better, except that it's super cool !
then rebinding is a must, or maybe using AZERTY or QWERTY for positions, so it's easier, or if you want to make typing a part of the game, having them change each time we press one, and do fire would be keys too, an idea :)