This is a ton of fun: cool concept and execution. There's a lot of good here already and plenty of ways to further expand later if you like.
A couple really small, basic tutorial levels would go a long way in teaching how the various blocks interact, learning it on the fly after going through a couple steps of the level first is tough.
Only real bug I bumped into was getting stuck in the ghost/crow blocks. And one UI idea would be make the mint hand a point (not dropper) when on clickable region. That's pretty much it, really great work