Well done on completing your first jam, it's a great experience and a real achievement.
you'll soon find out not to worry about the final quality so much as most games submitted end up being incomplete or buggy.
The simpler games can end up more polished, but it doesn't mean they'll do better than yours, and some games can be little more than an object that moves from point A to B, ni real art, sound or mechanics. I've even seen in 1 or 2 jams people uploading a design document, or rules for a table top game.
If you're like me, the jams give an opportunity to learn, and the structure to keep you focussed on making a game.