This is well known in Windows as well (and I suspect Mac) It is because the game takes over the settings for video and is not handling them wellthe monitor becomes "Out of Range".
For starters as you only have one monitor you should do a bit of editing
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gksu gedit /etc/X11/xorg.conf
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Option "DynamicTwinView" "False"
There is only one section called that. This should give you 60 or 75 Hz which are the default for LCD monitors and hopefully make the risk for out of range smaller
And have you installed the proprietary driver for the card? If not that's the basic explanation - use envy to do it. In Felicia you have to start envy from the terminal.
Installed by envy you can use
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gksu nvidia-settings