Enjoyable. I swept thru the levels available in a couple of days. A lot of potential but definitely on the track. The only thing I would change (can't believe I am saying this) .. at least offer an option to pay to get rid of the ads. I appreciate the totally free / no shop idea .. but It is painfully tedious to get hit with a mandatory 10-15 second interruption every new tile ... especially during those game areas that you have to open up 10+ in a row .