As the screenshot shows, any score in the purple, blue, or green bands would be a passing STAAR test score, while any score in the red band would be a failing score. Generally speaking, you'll need to get in at least the 25th-35th percentile to pass a STAAR test.
Some themes you might consider in the play include:
Greed Power and ambition What it means to be masculine and feminine Trying to persuade Idealism What it means to be a (good/bad) leader The importance of omens The difference between villains and heroes