Thank you so much for your detailed feedback! As for the physics system, the object is always scaled up from the center, but from the drawing box, not the center of mass, so it almost acts like a force pushing everything out. The pivot is especially noticeable with small shapes like a single dot and can lead to some wacky behavior. Looking back, I would probably update its center to align with the center of mass (so it doesn’t matter where you draw your shape in the box). I’ll add some text to the game once the jam is over and probably give the player an indicator of the center (If I don’t just make it update to be relative).
Level 18 was already the hardest puzzle in the game, and I see how not being given a proper understanding of the mechanics makes it a lot more difficult, especially because the relative placement of your shape can make the puzzle significantly more difficult/impossible. I added skipping so players could hopefully not get stuck and see all the puzzles, and I really like level 19, so I hope you were able to check it out. (no pressure!)