I assume there's no chance it will ever get popular, so that is not an issue. I am just planning on changing the name and removing some assets so that it will never cause trouble if, for some reason, some rewrites I might do of it (planning on one in C++, maybe one in Java as well with LibGDX though I may just learn LibGDX rewriting Pixel Zombies) get popular.
The game does have "The Reaping"
in it though, and could that be copyrighted? It is just something in the book and movie so I doubt it, but I can just change it to "The Selection" if necessary. What I will change the name of the game to I am not sure. I will talk to the friend of mine who made the original board game with me in the first place about that, but if anybody has any great ideas let me know.
Thanks for the information about what I need to do.