the way i have it is :
when a game ends, the score will be compared to
the high-score saved in playerPref key "highscore_Level_01"
if the score is higher than the high-score it will check the score value for the stars,
if the score is 100 it will set the int value from playerpref key "Stars_Level_01" to 1 , (if 200 to 2 and 300 to 3)
and then i use the fsm on each of my textures (objects)
with a different key for each level
all done in playmaker btw