If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
As a rock star, you cause the most destruction possible around your hotel. When the Strength bar is in the center, press Space bar to begin running. Press again to jump, aiming to land in the center of the bed. Jumping off of the bed, you will launch an item out the window. The further it flies and the more destruction and people-squishing it does, the more points you get.