(snake-final-x-velocity, snake-final-y-velocity): New variable and functions. Store user's keypresses into a queue and pop from the queue each subsequent turn. (snake-update-game, snake-move-left) (snake-move-right, snake-move-up, snake-move-down, snake-active-p) (snake-start-game): Use that queue. (snake-use-glyphs-flag): Renamed from snake-use-glyphs. (snake-use-color-flag): Likewise. (snake-mode): Rename uses of those variables.