Broadway themed bedroom on a small budget?! Please help?!?

Hi, I'm a 14 year old guy and I love Theatre, I want to turn my room into a broadway themed sorta-thing. I have about $100, that's it. I have light green walls and wood floors. I can't paint my room. Again, I'm a guy so please no girly stuff(: I have a bookcase bed which is dark wood, two doors, a window, and that's about it(: my room is 11'x11 1/2 feet.