It seems that you're using an outdated browser. Some things may not work as they should (or don't work at all).
We suggest you upgrade newer and better browser like: Chrome, Firefox, Internet Explorer or Opera
To prevent the game from crashing whilst playing, we've blocked the use of the Alt+Tab and Windows-Key combinations. So it is not possible to switch between applications or go to the start menu whilst the game is being played.
We are sorry for any inconvenience this may cause.