Level 779 is a level that appears as the default wallpaper for the operating system you used as a child. If you did not use a computer or mobile device until later, it would appear as your most nonstalgic operating system. If you do not have a nonstalgic operating system or never used a computer, mobile device, or smart television, you will be ejected into Level 780.
Known manifestations
Windows XP
If you used Windows XP as a child, it will appear as the Bliss wallpaper of the operating system you spawn in. It is a grass plain filled with hills and grass that is 5 miles cubed.