I can't even imagine how many hours of snake I played on my Nokia, but it was a lot. Whole bus rides would fly by in an instant.
Your World Serpent absolutely captures the originals immersion. On the smaller worlds, for the first time in my life, I experienced motion sickness which can only be an immersion positive!! In my mind, the gameplay is perfect and the jump mechanic is a great addition. On large worlds its a whole bunch of fun following your tail just to see how crazy long it gets. I died so many times from being greedy and going for a crab too close to my tail and not turning quick enough; again, just like original snake. Had fun playing this!
You definitely nailed the price-point, and your store page absolutely matches the game. Good job.