Bubble Sort Color Puzzle

I love this game, fabulous to play and relaxing, however, there's only one thing that if you have to press the back button a number of times you get an advert to watch and some adverts are entirely inappropriate. An advert for Manor Matters came up and although animated, the imagery was quite horrifying, as a relaxing puzzle game that's also meant for youngsters, I find this entirely inappropriate, there was no way of flagging it on the app when it came up, so I leave this review for awareness.

I've been playing this game for years, and I'm currently on level 9000. When I had to transfer phones, customer service gave me back all my levels, so there's great experiences with them. My only problem is the ads. 1 level = 1 ad. But, sometimes there might be a bout of easy levels and there you can be playing the game for about 30 seconds and have watched 4 ads. I think changing the ads to be based on time rather than level would be much better, like 1 ad every 5 minutes.

This game is not for me but I give you 4 stars because of my 65 y/o dad loves this game, i can't believe he completed 4000+ levels with his number strategy, before he start the game, he give numbers to each color and draw pattern on blank page and calculate the next move.