Very nice game! my only gripe with it is that I find that the snake's turns take too long I think that maybe only showing the turns of the snakes that are on screen could be a fix, though overall great game.
Did you find them taking too long when holding down the fast forward button even too?
I was planning to play around a bit with variable timing (snakes turn increases based on the number of snakes present on a board, etc) but ran out of time on this one.