I really enjoyed the game (up to the 3rd level where I kept running into walls...so I could not continue).
The controls almost felt like I was going in the opposite direction than expected, but that could have been me. I enjoyed the smoothness of the movement, and I really liked the changing of the walls with the colors.
I was bummed I lost my tail because of the wall a few times, but I eventually learned to circle a bit before eating the bugs near the walls.
The music was great and it felt properly spooky!