My story is pretty much like you,but with some differences
but i started learning unity 3 monthes ago, and this is my first jam too, and i was working on a massive game before this jam was even annaounced, then i felt bored of it left that game for about a month because i had lost all of my motivation towards it, and then this jam was announced, saw it on brackeys, and i was like, hmmmm..........okay...its cool lets continue on with the video. after that i found my self thinking about it all the time, then one day i got on youtube to watch whats new then saw it, the announcement that the jam had started 6 hours ago, okay......hmmm...maybe i should take a look at it then got even more curios when i saw the page and the rules/requirements/everything was pretty simple, i thought..........okay lets give it a shot, and i think i have a good idea to start things off,
started working on sunday morning, and everything worked out really good until then end.
so it was thursday and i had pretty much a done game, but Unity for some reason thought, ahhhaah......i could distroy this mans whole carear, so it still worked but when i built the game, a lot of triggers weren't working, had to scoop around all 2 days till i found nothing, and then thought of giving it one last chance to work, and somehow it worked!
my happiness was over the moon, and submitted it, 9 hours before the dead line.
here is my game if anyone is interested.
its a 2 min game.
https://itch.io/jam/cgj/rate/476320#post-943295 hope you play and enjoy and rate!