I must admit it was a bit too difficult as the attack was delayed. The slimes were very fast and I could barely get past the first two rooms after a couple of tries.
Still, it was impressive enemy AI, such that there were two and it seemed very performant. One thing I noticed is that clicking ON a cauldron did not attack for some reason, so I thought I was doing the wrong thing and didn't figure out the upgrading until after some time.
I would have obviously liked some music/SFX but the jam can be short, so that's reasonable. Even if you were able to get a copyright free music loop in there, I think it would have improved the experience a lot.
Interesting idea to take the "combine" theme in a more passive manner; kind of like a crafting loop kind of game, which is definitely "combining" even if I haven't thought about it in that term before. Definitely a unique take, well done!