I really like the concept and would love to see this idea have a little more time to develop. Walls can be hard to distinguish. Speeding up the snake feels actively detrimental. The game ending when colliding with a wall feels very anticlimactic. The current scoring system seems to incentivize just spinning around in a circle. I wasn't clear on why you would want to place a node at any particular part of the body. I think there is so much potential here and the art style looks excellent.