Way too many ads. After every level an ad. Though I persevered with it. Built the buildings with more ads. Not got to a point where no more buildings are available. It states "coming soon". All puzzles completed. The challenges are getting a bit challenging after about 70 challenges. The gum machine, you were able to spin with coins. But now you can only spin with.... yep you guessed it. You have watch an ad to spin the gum machine.