Yeah it was fun! I'd also try to include some "Play again? Y/N" prompt at the end so you dont have to restart the program every time you get an ending.
So the thing about batch files is that they are just renamed text files. And because they can run system commands, anyone who runs one is probably going to take a look at it first to make sure it isn't running anything malicious.
If you want to keep your source obscured, you should look into using a compiled language.
Fwiw, sharing your source isn't really a bad thing and there are benefits to it. But it's up to you.