There's a tendency for the bubbles to not all slide to one corner, and clearing the stage does not result in the game restarting or moving to another level.
Very nice. It could do with being neater, and with better graphics, but it's not a bad attempt at programming a very old "magic" trick.
HatMan seems to have missed the point of it.
Not really a game though, more an implementation of a maths based trick.
I fix bug with game over screen.