Ads prevent a good game from being a great game
The gameplay is simple and fun. The ad rewards actually seem to be worth it. Despite this, there are interstitial ads between every level. Considering how short they are, this is too much. An ad every 4-8 levels would be fine. Even worse, it forces you to play with an internet connection for the sole purpose of giving you ads. Fix these issues and I will update my rating accordingly.