I get bombarded with unskippable ads like every 3-4 minutes. Some ads start and just sits there on my screen with no option to skip or close. I had to close the game and open again every time this happens. Also progressing after level 12 is very difficult as it costs so much food to level up the dragons. And upgrading hatchery is also very expensive. Only good thing is they gave option to watch ads to skip time for hatching and breeding.