This is my first jam too!!
I started to work in unity a year and a half ago.. maybe more.
at first when the jam has started, i didn't really settled on an idea and just started experimenting in unity, creating some scripts and objects that in the end I didn't used.
at the end of the day 1 I had a really basic idea and mechanics, so all i left with was 2 days to make it feel fun and building all the levels and everything..
next time I hope I'll spend more time developing and less time thinking on a concept P:
Here is my subbmission: