I know that feeling, on my very first Jam when I did StarV3, my team also put a lot of effort but the programmer disappeared at middle jam.
He appeared on last moment, acted quite bad with the rest of the team, published the game lazily unpolished and don't even added us as authors on the Itch.io page.
So the game have, pretty pixel graphics but all bury, handmade interfaces but all buggy and half of the sound library missing.
It was still a great experience since even if the programmer failed us on making during a week a extremely simple game that anyone could do on a day following a tutorial, the rest of the team enjoyed making assets together and I got deeper into GameJams.
Check my creator page, you will see all cool games that I released after that 👌🏼✨