Whoa, this is really cool!
Played until I beat the first boss, really enjoying what you have so far.
Really liked the enclosure upgrade, made me feel a lot more powerful immediately. And the skill tree itself is one of the coolest executions I've ever seen!
Some of the visual effects make me feel a bit motion sick - would love to see an option to turn the distortions of the game field down. And the yellow/black moving stripes, while very cool looking, are distracting enough to make it harder for me to read the text - I think turning down the motion or making the stripes thicker might help??
I really enjoy the feel of the mouse controls. But, they make it extremely difficult to place down a segment - I can't control which segment I'm placing, and the snake moves in response to me trying to move to the right one which results in enough frustration that I barely used the mechanic, which feels like a waste of such a cool idea.
A simple fix might be to introduce a hotkey to briefly slow down time, giving the player a chance to do what they actually mean to.
Wishing you the best of luck with this project!