That's cool, I love that you added modding support. I think I've seen some people having interest in creating ghosts and animations, hopefully we'll see some of those in the near future.
It's a shame multiplayer wasn't working, but it's understandable since I've always thought multiplayer would be hard to implement in any game. It's why once I get sufficient in coding, all my games will be single player, I don't want to deal with something like that.