Hi. I'm looking for an old 2D Mac game my brother and I used to play. There were 2 players on the screen at one time, where each player was a circle with a cannon. The circle traveled in a direction on a predetermined track, and the only movement you could do was to reverse direction. You could move the cannon around 360 around to shoot at the other player. There were powerups for the cannon and also slow down or speed up the rotation of the circle on the track. I don't remember this game having a floppy, so I imagine it could've been a shareware or a pack-in.