Focus on clearing Locked Candies before the first Moon Struck and then try to make as many special candies as possible. Especially aim for large cascades, but be careful about the Moon Scale.
It is also very helpful to make color bombs, but make sure not to activate them in the game as they will activate immediately at the end of the game during Sugar Crush. This gives you major points in the Sugar Crush.
For unknown reasons, the target score for non-Facebook versions is different depending on systems. On iOS, the target score is very low, with 1-star score being 40,000 points. However Android devices have the score requirement much higher, being 160,000 points. Unlike on PC, candies have different behaviors on mobile. Furthermore, Moon Struck is a lot less powerful, resulting in less points, which causes the player to easily fail the target score requirement.