Yeah, the green and orange were placeholders I just plain forgot to swap out. *facepalm* As for the undo, I wanted to add it but ran out of time; I agree though, this kind of game definitely needs it. Or at least a move and then confirm.
Also, the enemy should have attacked the knight before the base. So if it didn't, that's a bug. Whoops. Thanks for pointing it out.
And thanks for playing!