I have finished the game and would like to share the sad ending to all of you.
After you collect all of things, items, and effects, she gets her reality and dream world confused. And goes out on the balcony, where a new item, a ramp, is there. The background is a dark, melancholy night. The sad music when you go into the area to get the flute is playing slightly in the background. She thinks its all a dream. She jumps off the roof, thinking its a dream. The screen turns to black. The music flute aea music returns, white flowers start poping up. Then she appears. In a dark distant background. She pinches her cheek, (as you do in the game to wake her up), but nothing happens. She realizes that she is dead. Stuck in the nightmare. She fades away, along with the white flowers and the credits start.