I got stuck :(
my bishop on white vs. opponent bishop on black, no other pieces left
Yeah, sadly it can happen quite a lot/easily on this original version of the game. There will be an patch coming to it in about a week or so fixing this and adding a bunch of more stuff too.
nice, what kind of stuff?
At least boss fights and more cards and events. And I'm adding an achievement/challenge system too to have more something to aim for.