Don't think I've yet seen a falling block puzzler this jam, and I can't believe how well this system works. Hi score is 6270. After I figured out how the mechanics worked and how the numbers looped back around after 0, I really started getting into it. At the end of my first game, my thoughts were "Wow, once you start to falter, there's no recovering from that."
But I decided to play again anyway, to see if I could learn from my mistakes. And what I realized second time is that the mechanics are cleverer than I realized -- you can come back from a giant stack actually, as long as you were putting alike colors together, and in fact, that gives you a ton of points.
So great job really. This kind of thing seems really hard to plan out, because it seems impossible to know in your head if the mechanics will actually work and be interesting before actually implementing it.