As a general rule, no Gen AI should be used in the game submission's development. It's ok if there's a few bugs in the game that weren't fixed in time, searching online for help, or even asking for help here and seeing if someone else can assist with your code issues. We mainly want to encourage the use of open source in games development and have no Gen AI/submissions be made by humans (∗≧ꇴ≦)人(≧ꈊ≦∗) working through issues and figuring things out can be very rewarding, as can adapting a game submission to work around a problem too! You can always expand on a game after a jam has finished too and add extras you wanted to at the start if it was too difficult to do in the time frame.
