The most interesting file is probably stars.py, which contains the actual game logic of stars, as yet limited to fleets moving around and all planet population always growing by 10% . The intention would be to recreate the whole "order of events" there.

Using a mongo database means that objects are saved between sessions, which is nice, and that you can just add/remove attributes as desired on all objects: mongo is a very flexible "document database" that doesn't use a predefined schema. This is ideal for developing/prototyping, and we can always move to a regular database if needed

We should also create test cases to check whether the outcome of the game logic corresponds to what we know stars should do.