Really unique concept and the puzzles are satisfying once it clicks! Some solutions are a bit obscure, some intermediate levels which teach concepts could do good.
For example the very first level has you pushing blocks without really teaching that you can do it. And the move teaching bottle is hidden, and it didn't occur me that it could be hidden. I actually left the game and reading comments got a small hint at it. After that the next levels were more accessible. I did 3 levels now, will come back later :)