Like the concept and look of the game, but the fact that I can't go backwards if I press the "next piece" button too many times is slightly irritating. Still nice challenging game.
I've noticed the blue pulsar can go through the middle if you turn a corner piece that way and I would like to see if how that would affect gameplay if that was incentivized. I think it would allow more complexity into the game since you're not following the border anymore.