Its pretty good
I am just playing and I see a guy to save. I click and save him and watch the 30 second ad. But at the end it doesnt let me finish the ad. Im stuck at the end and cant do anything at all. I can only close the game and reopen. And then I see I dont have the guy. Its so annoying. (I haven't seen the ads that apparently show up at level 15 since im not that high)