I think this is my favorite game in this jam.
Firstly, the web mechanic is fun to use and has so much potential for experimentation and secondly, the level design is outstanding. It almost feels like a full game already!
The puzzles are hard but really, really well thought out! So many times I thought "this is impossible", until I discovered a way to solve it. I also liked the atmosphere a lot.
As others have said, some features could use more explanation and the interactions between objects can be a bit difficult to predict (which object is heavier etc.). Sometimes I was unsure whether it was my idea or the execution that was wrong.
Also, I could not beat the last puzzle. I thought I had to bring a rock to the geyser (since you are allowed to go back down), and spent a considerable amount of time trying crazy things to make that happen. I should give it another try.