Is it okay if I submit my project incomplete? I know where to take it, I just don't have enough time to do it. I joined late, and on top of that I have other obligations to fulfill. Is that okay?
Pretty sure lots of jams get incomplete games submitted. The real key is not having it completed, but playable. Just one level? Great. Not all the features you want? That's fine, strip it down to the bare minimum. Just get it to where you can do one fun thing that people can play and rate. You can keep building and updating the project, but for the purposes of a jam, a very small working game is better than no submission.