If you're looking for a good time-waster, I highly recommend Puzzle Farter. File under "things that have no reason to exist, and yet do anyway". That file is getting full, ya?
You know why this cracks me up? Twenty years ago we would have paid $30 to play a puzzle platformer like this, and it wouldn't have looked as good, and it probably would have sucked, because most of the puzzle platformers that came out in 1988 sucked.
So yeah, Puzzle Farter. It's slightly crude (I've been playing it with the sound off--bodily function humor is lost on me), but quite an enjoyable game.