Game's requirements!

>> Movement:

• The snake can move in four directions: up, down, left, or right. "Can" doesn't mean "must". You're free to add more movements as long as you can at leat move in those 4 mentioned directions.

• Use arrow keys, swipe on a touch screen, d-pad or analog sticks to change the snake’s direction. The point is that the player has to provide input to change the course of the snake.

>> Rules:

• There must be a level boundary and the snake must be able to collide with it.

• Don’t hit a wall: If the snake crashes into the grid’s boundaries, the game ends immediately. Optionally, the player could start a new game if they will.

• Don’t bite your own tail: If the snake runs into its own body, it’s game over.

• Your high score is based on the number of squares added to the snake. But you're free to design the score increments as you will.

• You win when there’s no more room for your snake to grow

Those are all the requirements, but you're free to add up as many rules as you will as long as they don't interfere with the base rules. Have fun! :)