A very nice aesthetic to the game you got there! Love the art theme! Also, the puzzles are pretty w3ell designed. Aside from some bugs and UI refinements that can be made, the game is pretty much ready for release, in my opinion xD
You introduce your unique mechanics really nicely, and the only thing that I'd like you to add more than anything would be a few more levels using the stamping machine mechanic - it's a shame that there's only 1 level using that mechanic, which was the last level.
A lot of potential for the game, and I'm looking forward to your post-jam update!