Guide the bubble through 13 challenging levels of the mine. Use the arrowkeys to steer - and go easy or you'll hit a wall. And I worked quit a bit on sound, both for atmosphere and audial clues - so crank that baby up!
NEW VERSION: With added time-trial feature!
And YES, I am the real author of this game. If you wait until the scrolling text in the menu stops you'll see my name. Hope that proves it. Cheers.