This one doesn't seem impossible, but I've been stuck on it for a day or so. I'm wondering whether there's strategy I'm not getting about using the side zaps and color blasters. The first time I tried the board I came within one move of winning, and I'd just used the zaps and blasters the second I saw them. It seems smarter to save them, but since I've been doing that, I've been falling way short at the end. Any thoughts about how to best use them?