A: No, but you might lose your progress. Third-party sites do not save your login token, so you will always be a level-1 "Unshucked" egg.
A: That is unusual, but possible. Some browsers have extension conflicts with the main domain. Clearing your cache for shellshock.io usually fixes this. shell shockers websites
But with great popularity comes a fragmented web. Search for "shell shockers websites," and you will be flooded with dozens of links. Which are official? Which are safe? Which offer the best latency or secret game modes? A: No, but you might lose your progress