The game involves controlling a single block or snake head by turning only left or right by ninety degrees until you manage to eat an apple. When you get the apple, the Snake grows an extra block or body segment.
If, or rather when, the snake bumps into the edge of the screen, or accidentally eats himself, the game is over. The more apples the snake eats, the higher the score and the longer and more unwieldy the snake.
Note
You can learn more about the history of Snake here: https://en.wikipedia.org/wiki/Snake_(video_game_genre).
The game starts with a message to get the game started:
When the player taps the screen, the game begins, and they must guide the tiny snake head to get the first apple:
Note that the snake is always moving in the direction it is facing. It never stops.
If the player is skilled and a little bit lucky, then enormous snakes and scores can be achieved.