I think I may be the only one so far who actually beat the game. I think the difficulty is compounded by the red parts overlapping with green parts. Sometimes, this completely hides the red parts so that you can't find the last bit to click, and other times, you can't click the red parts because of the overlap with green parts, getting a false "wrong cut". I think spreading the individual nodes out a bit, or at least making the red bits appear and detect collision above the green parts would go a long way in helping the game feel more fair (which seems to be the most common comment). One last thing to be cautious of is use of AI art. That's really triggering for some reason to other gamedevs.
That being said, the gameplay, and tree structure is probably the most impressive thing I've seen in any of the submissions here. I took a look at the tree which you have on your itch page, and it's one of the most impressive ways to create a tree that I've ever seen. As a godot user, I think it would be a fun challenge to recreate that myself to use in gdscript. I also extensively tested the different scissors as I unlocked them, and they did indeed function as you said. I'm honestly blown away at how coding this is even possible. I feel like if I had the chance to read your codebase, I would learn something incredibly valuable. All around, great job. Great demonstration of your skill.