CONTRIBUTING.md

I mean, this is a relly simple game made as a C++ practice.

But if you want to develop this game further, go ahead. You may expect, however, that I don't respond right away becauce I have other things going on in life.

Try to do the following:

• tabs for indentation
• using curly braces on the same line
• try to keep the class based structure of the code
• camelCase for variables inside of functions/classes and this_thing for function arguments
• also use camelCase for function names
• keep it minimalistic, don't load heavy assets (so far it doesn't load anything)