wow! Such a focused comment! You got it spot on, my idea was about sequencing your layers/strata above your head. I wanted in the prototype to showcase that, but could only pull of the main mechanic in time.
Thank you, might have disabled the WASD by accident XD
Regarding the ideas, you are spot on! I want to make this as a metroidvania, where different creatures will work as different lock/keys.
The idea is to use micro-environments on you head, to lure in creatures that you can move to the correct location. The frog would be able to remove clouds of wasps or pesky flies (below is a 2017 drawing you have unlocked YEAY!).
But I had never thought of the tongue idea sticking to walls! Thanks again!