This was a super cool puzzle game. I think the levels were set up smartly to showcase a new concept without having to write out the new mechanic in the text. Some ideas: I would love it if the game remembered my setup for a level (or if I could save it) so I didn't have to replace all the pieces that I knew worked every new try. Also, I think it would be interesting to be able to pause mid-level to add elements, though that might go against the spirit of the game of trying to plan.