Melancholy Melanoma
Try playing the game through Gaia, it's working fine for me.
At the top of this screen, scroll your mouse over "Games" in the navigation bar, then click on "Play Monster Galaxy". That should open the game in a new window, and you SHOULD be able to play. Plus playing the game that way earns you gold when you use your bonus attacks.
Why do you think I would post it on here if this wasn't the place I played the game from?
I did do that, and when I come to the "Connect to Facebook" button, it doesn't play.