The game offers challenging levels. But I have to say I turned the sound off after a few levels; not because of the game play but because of the Powerpuff Pandas screaming NEXT LEVEL. I'm on level 1000+ and that got irritating quickly. I think the ad levels are fine. My only complaint with them is when I close out an ad I want to be taken back to the game and not Google Play for a chance to download a game I have marked NOT INTERESTED (repeatedly). And yeah, the repetitive ads are irritating too

I really love playing the game, the ads comes much later, not like other games, the ads come after each level. There is a glitch when you're trying to switch balls, the sensitivity of the finger touch, sometime sends the wrong ball, not the color you are trying to switch. The game is fun, different, and challenging at a slow pace, which is good for Senior citizens. 😊

If you don't mind some of the buttons not working, you might like this game. It has no timer, and I enjoyed the zen aspect, and the patterns, until I realized it is another pay to play scheme disguised as free. If you want 5 more bubbles to finish a level (I used too many bubbles), you can only purchase them with money. The "watch a commercial to get 5 bubbles button" does not work. So I deleted it.