Really fun puzzle game! I too got stuck on level 3, but mostly picked up on the mechanics. Still not 100% why the shape doesn't always change when something moves, but I'm sure I'm just missing something. If all of these are definitely solvable, then you did a brilliant job on laying out the puzzles. I'm usually pretty good at games like this, maybe I'll come back to see if I can beat level 3 another time. Also really enjoyed your pixel art style and the audio blended in really well with that retro vibe. Overall, great submission!