Start the implementation of the documents\GAME_DESIGN.md document according to the architecture described in documents\TECHNICAL_SPECS.md. Proceed fully autonomously and iteratively.

Make sure to update the documents after each iteration to update what has been done (with checkboxes).

I will go to sleep and leave on the computer for you to autonomously work and take decisions by youself. Try to finish the game in a potentially shippable form.