Has potential & fun sounds, but like others have said: gems are irrelevant except for buying skins, tons of ads, & the conquer map stops after USA. The obstacles are randomly generated, meaning all are relatively easy, but if you happen to get one you didn't pass it generates a "new level." So you can't redo it. Occasionally you might get one that seems actually impossible. Can't go back to check. (I did over 200 levels hoping to unlock more countries to conquer 😮‍💨)