Picked a game I'm working on, it seems fun and parts of it don't work. I wanted to make those parts work as they seem to be fully there, just have an issue or two from actually working. 

I've been going through the code base for hours trying to find where the mistake might be, and since I'm really new to all this I'm having to look up almost every line. 

Any  tips for how I can get at least something done on this project before times up?

I feel I am learning a lot from doing this type of work, but I also don't want to just re-upload a game that has no new improvements.

Should I add something small, and continue working on fixing the issues? What's something that would be trivial to add so I can work on the code longer?

If the broken stuff stresses you too much you should leave it alone. Make something different. Idk what you are working on but like nice stuff. Healthbars, Particles, Sound, New Art, Expanding content that is already there and works. You don’t have to understand everything in the project, most of the time I don’t understand my own projects. Just don’t let this demotivate you, aren’t you here to have fun. So go and do something fun.

Good Luck and have much fun