Thanks all for playing this. To move up, press the left mouse-button. Release to go down.
I know, at the moment, it's pretty much the same as the old helicopter game by seethru.co.uk, but do expect changes in the future. The only 'bug' I know of is that the blocks coming towards you are not always within the bounds of the cave, when they should be.
Also, I will improve the balance and graphics of the game in the future.