They do ask you rate them way to early into the game. It takes about 2mins to reach level 5 and they already expect you to know if you like it. Daily puzzles are interrupted every round with ads but, these ads are not intrusive during normal gameplay. Ads during normal gameplay is a banner at the bottom. Daily levels they have to short a time limit on some of them honestly making it less zen and possibly more stressful to beat the clock. Okay but, not great.