A-Maze-Balls! - Rollin' in the Backroom

Fun Dream. I won after having two balls in their slot, the the third slid over the last. Maybe you can have it so the three balls need to be in their slot for a small period of time for it to count as a completion.

It takes some balls to complete this one!
...Or better marbles.
Maybe you'd like to add a slight concavity to the colours at the centre, so the marbles will stay there for a bit while moving the board. Also load another level when complete. :D