I have a few points you might find helpful.
-First of all, as someone mentioned before me, the falling+fixed camera can make it hard to figure out what is below the screen
-Dying doesn't stop the clock, so you get stressed out and try harder the next time but end up doing worse, kind of like in classic Mario(this can be arguably good or bad)
-There doesn't seem to be any checkpoints in any levels so the more challenging levels(falling ones especially) is little stressing after a few accidental deaths. Not everyone is a pro at platformer games
-To fix the dead wizard bug you can simply make the player invisible on death and disable movement or lock the camera in place. Sure, this is kind of a hack fix but it's simple and doesn't hurt anything else.
-Perhaps add abilities to make each transmogrification unique(because as they are they just look different. The different platform touching is not unique since they each do the same thing to a separate block type). For example, you could give paper the ability(passive or active with a limited time) to fall at a lower rate, like how most paper reacts in normal gravity.
Otherwise an original platformer that doesn't suck. I didn't find it all that fun either, but when it comes to platformer games it's very difficult to please people.
3/5