it's a solo jam, so it's really 100% solo. If you're on our discord server, people typically share video clips which would naturally be getting early feedback from anything you share. Assets are all to be made by yourself unless you have existing assets you can use (sound packs you've previously purchased, art you've made, etc.) Gen AI assets are not allowed.
The 'framework' style code you've listed there, specifically, is fine. We dont want to beat developers up if they've already implemented a character controller 20 times. The focus is really on making cool things and having fun.