Thanks for the Q.
As @merwok already (kindly) added - this type of jam is quite niche, so it's not going to be everyone's cup of tea. 🤓
That said - this jam will allow to submit additional URL's, including a link to Commented source code).
So, for example, after you've made an entry that's < 1KB - you could (if you felt like it) - make a second copy with added comments, explaining your code for others to learn from.
Anyway, that's the jam and - should you still wish to enter something - I look forward to seeing it. 🙂
P.S. - You mention about submitting pieces you've created already(?), but the jam period hasn't started yet.
While it's not (yet) in the FAQ - you should only be submitting creations that you made during the actual jam period.
Hope this helps.