A bit like yourself I had to just focus on submitting "something" after another week of tinkering and procrastinating with what I really wanted to produce. I originally had an idea for a short adventure revolving around a small village which was being terrorised by my folklore inspiration - the Cü-Síth, a monstrous fey hound. In the end I decided that if I was going to get something I could submit I'd have to focus on something less involved, so I pared it back to just the creature background, stats and some plot hooks. I'll confess that I will probably revisit the original idea post jam, but for now I'm happy with what I submitted even if its not quite as gritty and dark as the scenario itself would have been. Personally I need to learn from this experience and take on board that its actually OK to pare things back, to focus on one idea. I have so many unfinished projects that stare at me from my work in progress folder that sometimes its almost completely disheartening - so submitting something small and "finished" is in many ways a big win for me.