As Shadowtooth, MorgraWolf and VortexAlive said could be one of the issues that you are experiencing.
However, have you checked if your game works correctly or is installed the right way?
If its the picture Shadowtooth has posted then your game is completely fine. Just leave the page open in the background and click "Play Game".
![Smiley :)](https://feral-heart.com/smf/Smileys/default/smiley.gif)
Hope this resolves your issue!
Stay safe!
~Winter