Hi, I am a beginner. I haven't seen anything about if we can use assets in the rules. Can we use sound assets or sprites or 3D model assets we got from other places? Or everything has to be original?
You can totally use other assets from other sources, so long as you have the license to use them (and, like, if they require attribution, make sure you give them proper attribution!). You can also look around to see if there's an artist looking for a team ;)