I really like the mechanic you introduced (I loved the space goo in Celeste so it's to no surprise), however I got really frustrated towards the end, I think that if you were sucked towards the ground/gelly/goo/whateveritis when you're close to it while pressing W it would feel better and alleviate the pain of these - pun warning - sticky situations.
Visuals and audio are both very well-polished.