Hello,
This is going to be an abridged version of the topic, but if you want more details, check out this post I created on Reddit.
Long story short, the Jam was very confusing about its rules, and after the jam was over, the creator asked for image source files ( .ai, .psd ) and development documentation. And even with those things submitted, provided no feedback or results ( in fact, there has been no communication at all since then ).
If you are comming here from a future game jam from this same creator, I urge you to stay away. There is a weird surge of games from game jams being stolen and republished in other platforms. This one is a recent example I came across.
Taking the risk of entering jams by this creator is not worth your time.
Thanks for reading.