frontend.ts
    Provides the entry start() function. Here we mainly create objects and
    put them together. After registering the game world, creating a websocket
    for backend communication and registering the actual player the game is
    started once the first update is received through the websocket.

game/
    game-controller.ts - MainGameController - Contains only a communication handler to handle
    messages from the actual game controller in the backend.
    
display/
    engine.ts - MainDisplayController - Object containing the draw loop which visualises
    the current state of the game model.