Starts like any merge game. After Level 35 onwards, it is designed to encourage spending. Certain tiles cannot be traded for Happiness and they block your playboard. Thus spending Gems to clear space. Game gets extremely boring by the end of thr 3rd level. Boredom sets in after Level 1. Rating is my experience. You might find it different. Gave this game a fair chance to show how it can be interesting. Sadly, variation on a theme.