It will only work if you are a scratcher Use WASD to move Use the arrow keys to shoot Press Z to say Hello! Press X to say Bye! The blue squares are other people The green square is you The red circles are enemies Enemies will have a shield for 3 seconds on spawn to prevent spawnkilling If an error occurs you will get a message. Please notify me in the comments if you do and tell me what you did for it to appear. If it shows when you join, it is likely 2 players are already playing.
check out https://scratch.mit.edu/users/Joboling/