If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
By day you are a corporate raider, and by night you are the most feared art thief in the world, the "Specter". Your newest weapon is a highly advanced electronic alarm-sniffer that you use to steal priceless works of art to sell them on the black market.
After entering the museum, you have a short amount of time to disarm the alarm system, or you risk being arrested. The faster you are able to disarm the alarm, the more money you are able to earn on the black market.