hey thx,
the gun has auto aim. after the jam i will probably add the use of mouse to aim (or only keys). the function is there in theory, but the auto aim overwrites it.
you couldnt use space or enter to select an option in the menu and/or a power up in game? i will check on this, thx for the hint. my guess is, maybe u clicked somewhere with the mouse and the menu lost its focus (didnt think of that til now :D)