Way too many ads!
I get that people need to make money. I really do. But I spent more time clicking off ads than I did playing this. Not an exaggeration; I got an ad every 20-30 SECONDS that would interrupt gameplay, plus a ridiculous amounts of pop-ins offering boosts for watching an ad (often the ad was 45 seconds or longer). Game was a good little thing; just spoiled by turning it into a forced billboard.