Could this be commercial stuff?

You may want to add a function that allows the player to decide when he has found a match. As it is now it seems like the computer does all the work and all you do is rotate spindles. It kind of takes all the fun out of it. Also you could add small things to make it more difficult. Like powerups that cause the spindles to do automatches or to spin wildly or flip characters upsidedown or one layer disabled for one round.

Just some ideas. I think its a cool idea for a game.