I love the 1.1.17 update, including all the new monsters and new behavior. I like the current level of challenge, but I'm stuck on two of the achievements (stamps).
The "board clear" seems like it's just bugged -- I cleared the entire board including the dragon at the end, got max score, but nothing happened.
For rat pacifist... I made a dozen attempts already and none of them succeeded. I already learned the secrets of the rat king, but they seem useless if I'm not allowed to touch any of the rats. Is there any consistent way to get this done, even a tenth of the time, without being extraordinarily lucky? [Update two hours later]: I got it! The name was apparently confusing, and killing the rat king is still allowed.