A really well polished game, and the central mechanic was very interesting. The graphics were perfect, the controls were intuitive, and the gameplay was straightforward, yet deep. The risk / reward of being close to enemies worked well, even though I'm pretty sure snakes don't get fleas! My only gripe with the game is that it was difficult to predict how the enemies would move and when they were going to attack. I think an "I will attack you if you're on an adjacent pad" indicator, or even a subtle movement / attack countdown indicator on each enemy would make the game more strategic. I can definitely see this being a pretty addictive mobile game, and I hope you keep working on it.