The snake moves on a 20 by 20 grid and advances on a 200 ms browser timer while the game is running. Use the arrow keys to turn; immediate reverse turns are blocked so the snake cannot fold directly into itself.
Food appears at a random empty cell and adds one point when eaten. The round ends when the snake hits a wall or its own body. Scores stay in the current browser session only; there is no saved leaderboard, touch controller, or server sync.