I really like this game!
The game feels really polished, all the little animations really make the game feel alive. I like that the creature beats as if it was some sort of heart, it really makes the game feel cohesive. If anything, I think you could lean a bit more into this aspect of a "formless" sort of creature by making the sound effects sound more fleshy. The beating sound effect really does sound like a fleshy heart, but I feel like the movement sound just feels like a regular whoosh, so it might be cool to make it sound like if it was a literal flesh creature moving in a gross and slimy way.
The gameplay is super smart and it makes you think quite a lot! The idea matches very well with the theme, too.
Keep up the good work, really loved this entry!