A really clever game! I'll admit it took me quite a while to understand the whole mechanics of what triggered what, what the numbers meant, the colors and all, but once I did it was an awesome mix of puzzle and combat! I did get the UI glitch in my first run, where the cards just didn't change at all and I was visually stuck on a Red 1 card, so that didn't help my comprehension I'm sure.
Incredible job on this project, really well done!