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Somehow, an experimental or future version of Flash ended up built into one of the recent versions of Google Chrome, and this version is unstable and gives players problems with their keyboard, frame rates, lag, browser focus, and more.
The easiest way to fix this issue is to use another browser. Firefox, Internet Explorer, and Safari are all supported by Glitch and should not have this problem with the Chrome-specific version of Flash.
If you still want to use Chrome, try updating to the latest version of the browser by typing chrome://chrome/ in the address bar, then checking that page to see if you can update.
If that doesn't help, we recommend that you install the most current, stable, standalone version of Flash player by downloading it here: adobe.com/go/getflash (the current version is now 11.4). Run the installer, then open Chrome and type chrome://plugins/ into the address bar. Find the listing for "Flash," under which should be at two listings. The one on Windows which is not Chrome specific will have a name similar to:
NPSWF32.DLL, or NPSWF32.DLL. Click *enable* on that version, and click *disable* any Flash version which is found in a subdirectory of Chrome.
On a Mac, disable the Flash player which is within a directory called 'Google Chrome Framework.framework' and enable the one called:
/Library/Internet Plug-Ins/Flash Player.plugin