I bought this to be a time waster. It worked. For about 5 minutes. After five minutes with this app I had cracked all of the puzzles. When they add more puzzles I will change this to four stars, when they add even more it will be five. Hopefully the new ones will be harder.
Update: the new level is great, but the text is wrong: I did it in 29 moves-two less than the "minimum"
themoonglows about River Cross Logic Puzzle Game