Finally completed the game. This is so good! Love the idea and the puzzles, didn't think they could complement each other this well but here we are. The puzzle are also nice in the fact that you don't need that "exact" solution to solve, such that you are not that punished if you missed a piece in the level. Loved the fact that the puzzles are in fact upgrades, and you really need to go back to earlier maps just to collect missing pieces. Brilliant!
So here comes the nitpicks. Besides the obvious softlocks that I am not going to talk about, there are a few things that drag down the experience a little bit. Although explained through text, it would be really helpful to explain to the player that you don't need to fill the whole thing in order to solve the puzzle. This is me trying over and over again to fit all pieces to the frame, only to find out later that it is not recommended. I am guessing that it is likely possible, but just that I felt like emotionally robbed the second I found that out. (Or it's just me being stupid). The second it that the enemy feels like a bit too fast given the limited combat the game has. Feels like it's sometimes down to luck if I am going to hit one of the bats using the projectile.
But in general, I love this game so much. Can't wait to see the game being completed. Good job!!