Yes, the system ignores the /00system folder for normal playback so anything in there won’t be shown. That’s why I put the alert animations inside /00system/wifi.
You can upload animations there using the upload tool in the web control panel. Did you try it? Just provide the path (e.g. 00system/wifi/reddit) and then point it to the animation files. You won’t be able to delete it with the web tool though — you’ll need to insert it into your computer for that.
However, you should probably replace your web control panel INDEX.HTML file with the attached one. The one on your Game Frame controls brightness whenever you use the 0-7 keys, and that gets weird when typing “00system.” 🙂
Just download the attached file and replace the INDEX.HTML file using the secret help page inside your Game Frame located at http://your.ip.address/help. Or just copy it into the /wifi folder manually.