Do we get the source files?

Isn't there any copyright infringement with the owners of third-party heroes?

They are writing the code from scratch, although I don't know if that's allowed either... But formally, nothing is being stolen (except for the game's assets being available in the open).

This software isn't working!

Well, it worked fine on my brother's Android phone... Although at that time, there were a lot of problems, starting with the lack of random map generation and ending with the complete inadequacy of the computer opponents.