Make GameZero types better and more extensible

[DhruvaSambrani]

Right now, all Game objects are concrete. However, it may be worthwhile to abstract out things right now.
Primarily, Game and Actor must be subtypes of AbstractGame and AbstractActor, which themselves can be concretised to Actor and Game. Functions which can be abstracted should be.

[scottbigbrain]

There are a lot of functions that probably need to be abstracted, but what would be the reason for abstracting Game or Actor?

[DhruvaSambrani]

Hi, so I have completely forgotten about what I was thinking about. I shall close and reopen if I remember what I meant