Hello, I just wanted to get some clarification before the jam starts. Are assets bought off the Unity/Unreal store allowable for the jam, so long as their usage is specified in the game? I've got zero art skills, so any projects I do that aren't just geometric shapes usually end up using assets I find there. 

Totally fine to use any art assets. All we ask is that an usage is legal regarding any license on the art (which should be fine for most of the asset store) and that if you're using a specific artists work you consider crediting them. It doesn't have to be specific to the jam, we just don't want people to use stole art.