Fun idea, hilarious execution. Movement is well balanced, and I like the steady, inevitable end that is snake.
Just short of 350k, and I feel like the best plan is to grow it as long as possible and then detonate it - this guarantees your death, but it's worth a lot of points.
I'd love to see a way to give a benefit to a gameplay style that detonates snake sooner (maybe you need to survive for a few seconds after detonation to get the points.)