Man, I asskicked Avoider.
Some tips. A. The game is buggy as hell. if you manage to get a power up at the same time one of the other three blocks hits an edge, it will get stuck. Once this happens at least once, you've pretty much won. B. Avoid using the R power up. Yes, it'll shrink you, but you'll be unshrunk after a while. It's very easy to get screwed by that. C. Inverse is pretty much useless. Indeed, you'll want to avoid it like the plague if you get one of the three blocks stuck in a wall, as it'll possibly free one of them.