[remram]

It would be fun to go the other way, make a giant canvas that you draw on based on the sender's IPv6 address.

Obviously it would be a really really big canvas but you could strip some leading or trailing bits.

(If we give 8x8 pixels per /64 and considering that only 2000/3 is used, that's 2^67 pixels)

[blueflow]

The sender address of a packet is specified by the sender. So the game would be the same, you would just encode the pixel data in a different area of the same packets. Security folks call this "spoofing" but its just an aspect of how networking works.

[remram]

You can prevent spoofing by using HTTP requests or similar, instead of ICMP echo. Similar to https://ipv4.games/ (but with a canvas and color selection)