stupid snake game

People can clock left or right buttons to move the snake left or right. There will be a fruit on the screen at each given point in time so the player's objective is to eat as many fruits as possible. If the snake bumps into the wall or itself, the game is over. Each time the snake eats a fruit, its tail gets longer so it becomes harder and harder to not bump into itself. In this game, the player can choose the size of the world the snake is in (10 <= size <= 40)