The developers of Shell Shockers (and the community) create alternative web addresses. These addresses host the exact same game files as the main site. However, because the URL is different, it hasn't been flagged by the firewall yet.
"You're using a proxy," Root typed. "A little tin can and a piece of string. I own the telephone exchange." proxy domains shell shockers
The screen flickered. The cartoony chicken coop map glitched, the textures peeling back to reveal raw code—green lines of JavaScript and Python. Leo’s character, Sgt. Scramble, started walking left on his own. The developers of Shell Shockers (and the community)