Tarzan Ball, to be precise. You've earned the nickname thanks to your astonishing ability to shoot out a lengthy 'vine' (I hope it's a vine) at objects, and then pull yourself towards those objects.
That's a handy ability to have, especially since you've got no legs, no arms, and no other means of transportation. In Tarzan Ball, the rope is everything. But you don't just swing around the screen aimlessly - that wouldn't be much of a game now, would it?
Instead, your goal in life is to collect "targets". Each level has one of these "targets" hidden away somewhere on the screen, usually behind some kind of barrier. Once you navigate close enough to the target, you can shoot your rope at it and just reel it in. That's when you pass the level.
You can't die in this game, but it can still be very frustrating. It's actually one of the tougher games I've posted recently. Still, if you enjoy physics games, this one is quite nicely made.
[This is actually the sequel to IQ Ball, which we covered last year! -Ed]