Gameplay: Feels good, makes sense, clearly communicative. Great job.
Creativity & Innovation: This has some creative flair to it. Connection games aren't uncommon, but enemies becoming part of the web creation is something I haven't seen before as a general design choice. If you expand and make the cast yarn have more meaning than just existing, you can have something very interesting there.
Theme Adherence: Solid theme adherence. Connect all the things. Except trees.
Playability & User Experience: Simple controls and clear player action. Controls also posted. Good job.
Art and Design: This is really good art for a jam.
Overall Fun Factor: This has a lot of fun elements, and if you find a way to add meaning/value to the cast yarn in the gameplay, then you'll really have something to show off.
As an overall comment: This is really impressive. A little more expansion on mechanics that interact with the yarn ball and you'll have the basis of really solid indy action game.