Well, I do have the game by now - and, unfortunately, I've already stopped playing partway through the first of the unlockable worlds. It definitely seems to have been designed with controllers/consoles in mind, to the point where it's basically unplayable with my keyboard/mouse (and I don't fancy buying a controller just for this).
Maybe I'll pick it up again if it gets patched, but for now, it's just going to sit unplayed in my Steam inventory .
Maybe I'll pick it up again if it gets patched, but for now, it's just going to sit unplayed in my Steam inventory .