This was cool, although I also got stuck trying to figure out how to move diagonally and ended up downloading the mac version so I could look at the source code. (it’s Q and E for those wondering) It’s an interesting concept, I hope you keep working on this!
One thing, it doesn’t say you can capture pieces from the side, but I was able to. I'm not sure if that's a bug because I can’t figure out how I could win without doing that.