Really excellent. Great visuals, music, and solid gameplay. I found it a bit too easy, but that's just me. My last few plays of the game I was able to guess the correct rule after only two scans.
I strongly agree with Dwight about the selection highlight, it needs to be more contrasting.
Overall, there's very little to critique here. Really really solid. It's not my favorite game in the world of course but there's basically nothing wrong with it, it's incredibly well done. Probably my pick for winner of the jam. Nice job.