It's easy to see why this remained a playable prototype. It plays like a series of ideas on a chalkboard under the heading "what if we changed... this?.. from Pac-Man?". None of the resulting ideas manifested in a better or more interesting game.

In place of fixed boards and channels, walls move or can be flipped around. There's some enemy variety, including some with bullets, and the player character can also shoot. Movement is relatively free, although I often found myself waiting for gaps to open up in the moving walls that I just mentioned. The only interesting ideas that I found were the somewhat order of levels, based on exit doors, and the option to restart from the last board played before death.

I played until I could easily top the default leaderboard and I think I get the idea. On to the next one in Atari 50.