You are right, to be fair I wanted first few levels to be introductory puzzles, so to clarify game mechanics (e.g. match is on the top, orientation matters, etc) like in baba is you, and then it gets exponentially harder, but I didn't have much time to implement all the levels, so it all became easy peasy. The last level few were the level I wanted the player to finally play the game, on the level before the last (where you need to put 1 on top), I didn't do a great job indeed. Thank you for this review, I really hope more people leave something as helpful as this. Thanks for playing, my fellow jammer!