Great game. I've always liked your games. I have a small feature request. When I'm picking the next map to play it can be hard to tell which squares that particular map connects to. The square highlights as I move my mouse over top of it, but it's not always clear that defeating that map will open a particular adjacent square. I thought that this might be intentional, but that kind of guessing doesn't make the game more fun. Perhaps there could be a graphical indication of the squares that a particular square is connected to.
Very excellent game. Great balance, and an interesting variety of strategies. The animation was smooth and even when a lot was going on it performed well.
Only one suggestion. I used the 'a' button (to accelerate the game) a lot, and the 'garbage collector' (using shift to collect multiple squares) a lot. However, when holding shift, the 'a' button doesn't work. It's a minor thing, and the only glitch that I encountered.