no (stock images arent allowed in the jam)
also if youre looking for sounds go to freesound.org or mixkit or something (dont yoink a sound that has a watermark tho) (some extra advice: on freesound pay attention to the license thing on sound pages)
Dang. Not that I was planning to use stock images anyway.
if i use newgrounds audios?
ill allow it (also cite audio sources (you dont have to give credit for cc0 things tho))
Wait that rule is like putting on and off a light bulb