Amazingly fun game, that make you think and solve problems with marbles.
The best part is no ads, no interruptions, and no powerups to solve puzzles.
There are help videos for those levels that are too difficult.
I've been playing Marbles Ricochet for a long time now and I still like it. Most levels can be solved in 2-4 takes, and some I just skip for the time being. I found out that it's easier when your mind is fresh the next day.