Very fun! I've played these hopping games before, but the solidifying slime mechanic really makes this game special. It sort of turned it into a turn based platformer! I enjoyed this one a lot. I have literally no complaints! Well, maybe the difficulty. It did get tricky at times! I have to add, the inclusion of an undo button stuck out the me for some reason. It's a user friendly thing that you don't usually see in jam games. Just wanted to mention that.
Anyway, great job!