What a wonderful game concept. The movement control (forward relative to the snake) was jarring for about 1 second then felt great (snake.io). It was a nice feeling to have this snake move toward all these other animals...and be friends; like another 100-acre wood.
Did run into game-over (game break?) on first playthrough. Couldn't figure out how to recover....and, Slither on.
I like the way the snake bounces off objects. The way you gated movement into new areas was very clever.