This was so cute! I loved that the little guys played a song together. I did find it a little difficult to "plan out" a puzzle in my head beforehand, which I think is really just a result of the mechanic itself. Maybe it would have been nice to have had a couple puzzles that were just one shape, to get used to the idea of using blocking objects to find the correct position, then a couple puzzles with the other shape to show that different shapes behave differently, and only after that getting puzzles with both of them. I really enjoyed this though, and the puzzles were clever. I loved that the triangle could climb onto the square, but not the other way around, made for some really fun puzzling consequences to explore. And you even added some extra, optional puzzles at the end like I did with my game! Love it :)