The game is very stressful, and it presents a unique challenge. I feel like the controls could be tightened up to allow for more precise movements. At the moment, it feels like I'm waiting for the game to "catch up" to what I want it to do. And this makes it feel like a little bit of a chore. I would suggest a different control scheme for the game. Perhaps dragging & dropping? Maybe a drag & drop control scheme would feel good on mobile. Also playing around with the idea that you can obtain more "body parts", so you can be a little longer, get places easier, add an element of puzzle solving perhaps. The core idea is good and I believe it allows for evolution.