The Tutorial Image tells me to click on the icon but nothing happens? Do I need to press a button to put a bomb on the board?

Using bombs more than 30 times in a single game does not unlock the "Crazy Bomber" achievement. And the meaning of "Continue the sister time at least 5 times." in "Sister's Breeder Reactor" I don't know if it's "spawn 5 sisters in sister time" or "encounter 5 times in a row without encountering sister time zombie rush". Also, most players don't know how to unlock the achievements because the conditions for activating and continuing Sister Time are unknown. Developers please fix this if it's a bug. If any...