[baddox]

Maybe it makes it too easy, but I would enjoy the mechanic that quickly pressing UP LEFT when moving right would make the snake head move one square up then turn left and continue left. I suppose that would require some special casing, and you wouldn't want to support longer queued direction changes. Maybe a nice implementation would be that for inputs queued within a single game tick, execute the first input for one square of movement, then the last input for the next tick.