Misty sees the cage as "her" space and, like my girl, doesn't like "invaders" for long periods of time.
A good way to show her how to play with her toys is to take them out and play with them yourself in front of her and then put them in. You can also move/shake the toys a little from the outside of the cage by grabbing the hook/clasp attached to the bars and wiggling it around a bit.
I would also try and experiment with different schedules, birds usually respond very well to ordained times. My girl used to act just like yours and constantly wanted to come out. I taught her that she gets to come out at certain times of the day and nothing she does will change that. For example, if you're cooking dinner and she wants to come out right now
, tell her "Sorry, Misty, you can't come out now" and ignore her. Ignore the flipping pacing, screeching and head bobbing, and when you're done with dinner, let her out. If you do something like that at different times of the day, she will learn when she can come out and will learn to amuse herself in her cage before then.
I hope that helps a little bit!