Yeah the mushroom is my least favorite as well which is why I avoided using it as much as possible outside of a few levels. The problem with the puzzle design is it felt very limiting in what I could make due concept that both characters move. The mushroom inverting one allowed more interesting, but complicated, puzzle design. As I got better at making puzzles though I found other ways around it. I had a few more puzzles but didn't include them to keep the game a good time length. After the jam I plan on publishing a full version.