I have voted 5, but there is a little bit left to do.
first - make numbers transparent, otherwise it disturbs often/
second - when other snakes passes by, you still hit something, like opponent is still there.
third - you don't hit your own snake. I don't know if that was an Idea or not. if not - then fix it=)
but game is awesome. I have never seen so originally made snake game before! keep working on! you're good!