Very nice, and very polished for a jam game! It looks nice; you've designed some interesting mechanics, and you've even somehow had the time to put all that together in a way that is fun and puzzley. Wowee!
Small issue, and didn't really have any effect on my rating now that I think about it, but a restart button would be really nice. The number of times that my stupid stuff would end up with the green... stuff(?) everywhere and in need of a restart were countless.
Again, that's a very small thing. Overall, this is freaking great!