http://rydia.net/udder/prog/bounce/index.html - Download the game here for free
Bounce is an experimental overhead breakout game. Instead of a paddle, you get an octagon, and you can move anywhere on the screen instead of only left and right. In addition, the ball doesn't go out of bounds, it bounces off the edge of the screen. However, there's spikes that can harm the ball, so you'll want to avoid bouncing the ball into them. The spikes won't hurt you though, and if you're holding the ball, it won't be hurt either.
You can hold down the mouse to phase, which causes enemies and their shots to pass through you. If your ball touches your octagon while phasing, you'll recapture it and can relaunch it. However, phasing is on a limited meter, so you can't use it all the time. There's also a combo system that builds up when you destroy multiple bricks w/o recapturing the ball or hitting the edges of the screen.