Good game, it's a little bit hard to control, but as the other comment says, i guess it's part of being underwater. i noted there was a decreasing bar on the top left corner, i assume it was like a O2 bar, it could take less to ran out, because i finished when it was at the half, and i died a lot of times, also, more levels could be better instead of decreasing the time the bar takes to go out.