So all you have to do to join is pretty easy! Just remix the project, duplicate the sprite of the cat, edit the Name: (name) block, and edit the costume (if you want to edit the costume). There! As you, people can move! If you click on a person, use the arrow keys to move them! You can add a sound, you know. To do it, go to the backdrop, add a sound in sounds, then, for the last, change the variable "Sound numbers" Up by how many sounds you added.
C2A