Add a more appropriate license

[Hoboneer]

Hey again, so I've noticed that the license you chose for your code is Creative Commons.

I've read that the license chosen for this game isn't appropriate for software; see github/choosealicense.com#33 (comment).

So would you change the license to something more appropriate for software and then add a license separately for the non-software parts (e.g. the assets)?

https://choosealicense.com is a good site to get some ideas.

[MaxwellSalmon]

I have updated the license to Mozilla Public License 2.0

I think that will do :-)