Thank you all for the feedback=) this game was actually intended to be played on mobile devices, using gyroscope based control. And of course it supposed to be a full screen, but it does not satisfy the jam rules =). What about keyboard control -- i've tried it as well but it doesn't give this smooth feeling, like mouse or gyroscope does. For those, who found it unable to play, i'd recommend setting the mouse sensitivity to maximum. It looks like standard settings are not sensitive enough in some browsers.