This is a pretty decent entry.
The graphical style is kind of a mess. Some of it is retro, some of it is lowpoly but modern, some of it is just weird. I don't think that's necessarily a bad thing for this jam so I didn't rate against it.
The gameplay was simple, but solid. I'm no good at it, but it works. I found it confusing at first but it grew on my once I figured it out. Score attack with a shared leaderboard was definitely the right choice for this game. I'm impressed that you got that working; I had a similar idea but declared it out of scope early on.
I was never able to figure out how to get into the classic version. I do like the box art and title screen a lot, though.