Hello,
Great. I'm glad you were able to get Flash Player installed successfully.
Regarding the performance after several hours of play, can you file a bug at https://bugbase.adobe.com/. Please include information on your machine (hardware and OS/browser) and the URL to the game(s) that you're experiencing this on. The bug will be reviewed and triaged by one of our QE.
Thank you in advance.
--
Maria