Fun up until I hit lvl 10. Then it requires me to watch an ad to get my bonus reward, which I have to claim to keep leveling up. Guess what: ad is not available in my region; try again later. Been stuck here for 3 days now, and I can't progress my character until this is fixed. Until this is fixed, it's a 2-star. Gameplay is good, but in a when the game will get progressively harder, it's kinda important to be able to progress your character too.