I managed to submit something too, but it's very unfinished. At least it's something. I have a start screen and an end screen and some gameplay.
https://volyoometric.itch.io/tomato-ducks-gamejam
For a jam, if that works, that's all it needs to be.
With the tight timescale and the ambition everyone aims for, it is rare for someone to fully produce a perfect game, end to end, in a game jam.