Then Avatar Drop
is for you.
Basically, I was wandering around the Game Marketplace, looking for stuff to spend my points on after getting Zombie Apocalypse (which is a pretty good zombie game). I came across Avatar Drop. I bought the full game (dunno why, but it was only 80 MS Points so I couldn't resist) and played it. It's just hilarious. It's basically the equivalent of the Falling Bush flash freeware game, except there's a scoring system and your character isn't totally lifeless.
It's a hell of a timewaster, and I suggest you at least pick up the demo. If it amused me, it'll most likely amuse you.