I loved this game when I found it on greatmathgame.com, though you aren't credited there so maybe you should check that out. The only difference I noticed is that there isn't a barrier between worlds, so maybe its an older version. You should really add a fullscreen to the itch version though.
Anyways, I absolutely adore the puzzle design in this game, it really is a treat figuring out challenging levels like 2-9. Of the mechanics, I really liked World Three's hotspots. It was definitely a bit annoying to try to count out to rotations for World Two, but it was overall a great experience. Also, the music and sound effects are phenomenal; they really make great background noise when you're trying to solve a hard level.
I was able to beat every level and found optimizations on 2-7 (-2), 2-11 (-1), 3-3 (-1), and 4-3 (-1).
