I have some materials I got off the Unity Asset Store, can I use them? Making materials always takes very long, and there are so many good looking generic materials already out there.
How can you tell if I used premade assets or made the game at an earlier stage? Outside obvious red flags, we don't really check. Jams are for fun. Bend the rules if you want, just don't cheat yourself and be a jerk to mess with genuine folk.