oh! Thanks for your post! I've been making the game based on my own USB controllers. Could you provide the model of the controller so I can check that out? Alternatively, could you log which buttons are which using http://html5gamepad.com? Just the face buttons, left and right shoulder, and the start/select buttons would be great.
Thanks for your feedback! I'll try and support as many control setups as I can, so it helps to know when things don't work.