Fun little game. The controls in the description appear to be flipped around -- I was using X to jump and Z to shoot. I only made it through 7 rooms, but there were a couple things I had issues with. First thing is that the jump sound is really loud, like double the volume of the blaster at least, and it really grates on you after a while. The other issue is that in the second room, if you fall into the spike pit you basically have to wait until your hearts run out because there's no way out.