Interesting level. Nice use of the gelatin and mud floors.

You might want to point out the fact that you need to throw the barrels to go to the level where the peagun is. It was hard for me at first.

I like how you defeat the boss as it is submerged, and suddenly it is like "Nope! I'm back, except flying this time!"

It could use a bit more work, but I like it overall!

This is a nice level, but I didn't completed it yet... slime dimension sure is a dangerous place to live... I'm stuck on that multiwave room, I need to try a bit harder.

And I second for that gelatin floors, very interesting to see the trails the characters left while they walk :)