Well, better late than never, right?
I know I'm far too late to enter my project into the voting, but I thought I'd still share what I've finished because this game jam was the reason I did it.
https://pfail.itch.io/gem-diver
If anyone has a spare 10 or 15 minutes to check out my little prototype, maybe even leave some feedback, I'd be absolutely grateful.
Best of luck to everyone who participated, and thanks especially to Second Dimension Games for hosting.