I enjoyed the game and it had some fun and interesting concepts. Your health points slowly melting away was very interesting, and it was also neat how your hitbox size would change as you melted. It feels like this changing hitbox size could have been utilized for making potential shortcuts or alternate routes or something along those lines.
On the flip side, I did find the double jump mechanic in this game a bit annoying, and I think it would have benefitted from a more standard double jump mechanic.