Added divs for the game board and snake.
Added styles for the game board and snake.

Just simple stuff now in the beginning. One big green box for the board, and one small red box for the snake (player).
Added key listener to change direction of the snake and a function to move the snake every 500 ms.

The key listener only reacts on the arrow keys at the moment. The movement of the snake is always to the right and starts when document is ready().