Excellent visuals and sound/music! And with the simple controls and nice quick levels this would feel right at home on the GBA! I also really liked the simple way you made the slime feel goopy by wobbling its face as you moved, nice detail and good feedback for input! With these kind of escort games the danger is that the player will be sat waiting for the NPC to catch up, so not only were the short levels a good idea but being able to shove the wizard about was a great call, quite funny as well! It was also a nice lightbulb moment when I figured out that resetting the slime's scale moved it to where it's face is, and how you can use that vertically and horizontally.
In terms of mechanics the only real issue I have is that sometimes the scaling can feel inconsistent: tapping the scale button doesn't always reset (might be an issue of the timer distinguishing a tap and a hold, or maybe best to tie this function to jump?), and when you move to fill a gap the slight travel at the start can be a bit annoying if you drop the wizard, if that makes sense. I think for the sticky wall mechanic you just need a couple frames of animation and that would make visual sense too.
Terrific effort for 96 hours! I'll be waiting for the full release!