This was a lot of fun! The explanation of the mechanics on the page was helpful, though mostly just to avoid wasting time trying to figure it out. I wonder if some kind of background/static images might have helped lead the player into some of the rules (e.g. a red icon on the left and a yellow icon on the right). After a couple levels I felt like I was missing something and went looking.

Regardless, this was a really cool exploration of these mechanics. There were some tricky levels here. I think 17 was probably my favorite, but the last one was pretty neat, too (at least as a programmer).