Fun but frustrating at times
It goes through spurts where you can’t win until the game basically allows it by giving you keys to solve it. This can take days and in that instance it’s boring and not worth anyone’s time. The cards you collect also duplicate repeatedly and don’t really pay off. I guess they want you to just buy credits and that isn’t fun anymore. I used the game to pass time during cancer treatments but I won’t waste time on days and days for one boring level anymore. They could improve that but in 2 years it hasn’t changed so I guess it’s time to move on to another app!