Flash content is getting blocked in the latest versions of browsers. To enable it in Google Chrome,
first open your browser and type chrome://settings/content/flash in the address bar or go there from
menu "Settings / Privacy and security / Site settings / Flash". On a flash setting page, set toggle
to Ask first (recommended). Now, with Flash enabled, whenever you visit a webpage with Flash content,
you’ll need to click on the Flash player for it to start.
Check the map of the museum properly. You have to reach the emerald chamber and steal the precious jewel. You will have to collect some keys to open some closed doors. Try to understand the color of the keys and doors. The precious emerald is of course green. Steal the emerald and escape from the building before the cops arrive. Use arrow keys to move, stay alert and avoid the laser beams and cameras to avoid being caught. Hint: check the map to discover which room you are in if you feel lost. Pay attention to instructions on the bottom left.
If you want to play this game offline and without any browsers after December 2020, then download .swf game file and use any Flash Player that runs .swf files.
For Windows users, I recommend ARFlashPlayer (it supports fullscreen option) or official Adobe Flash Player. Both programs are portable.
Another way to play flash games is to install SuperNova SWF Extension (it works in Chrome only).