To be totally honest, I have effectively zero electronics background so there is not much feedback I can give on this. It sounds like you have considered most things between the components to the communication protocols that you think would be better for scaling. The diagram is very clear in terms of how everything is set up so overall, great work!
The circuit design is well thought out and explained on the website. It seems that this design will fulfill the needs described in the presentations. It would have been nice to see the information presented in an animation or with more images, to show how all the parts will connect and be programmed for the game. Otherwise, great job!