Press [Insert] + [Alt] during a fight sequence.
During a fight sequence, press [Insert].
There are three stone keys given in the game. You will find difficulties matching those stone keys because it is neccessary to match those stone keys to go to next puzzle. However there is easier way to solve that problem than trying all the possibilities. It won't be hard to get the first stone in the right place. All you have to do is just to remember the placement of the first stone. When you get to the two stone key problem, the first stone will be placed where it was before in first place. It is same for the second and third stones.
Pick up the newspaper and hassle the doorman. Insult him until he starts a fight, praise Madame Sophia or use the fire escape behind the crates - all methods gain access to the theatre. Chat to the man and when you can, ask him if there is something he'd rather be doing - give him the newspaper. Walk to the levers, push the first and third, press the button for a show...
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