Hello guys, its my very first game jam of my life, but as a beginner I am having a lot of missing pieces into it, like ui is not complete, I was thinking of adding 5 levels in total but i am at the 2nd right now and half of the jam is over. should i upload an unfinished game in the jam .. 

I also have a lot of time constraints because of which i could not dedicate my time to it as much as i hoped .. :(

I’d recommend you making just one level (or two if the first serves as an intro, depending on your project). Pour all your skills and time into one great level instead of spreading yourself thin over five. Don’t panic. Best of luck!

Definitely submit an unfinished game over nothing at all! No one is going to be able to submit a 'complete' game for this, there are always things which could be added or changed or improved upon. Part of the experience of doing a game jam is learning to compromise between your vision and what you have time to actually accomplish. You can use this as an opportunity to understand what should be prioritized.

You still have lots of time before the jam ends, don't give up! A work of art is never truly completed.

Thanks guys