Check out the most recent version with working multiplayer! https://scratch.mit.edu/projects/618922465 WASD to move, mouse to look around/change direction, space to jump, click to throw snowballs. It's still a work in progress.
Work in Progress. I had to share it to test cloud variable encoding. The cloud variables will not work if you have not achieved "Scratcher" status. I'm using this to help with the 3D engine: https://www.youtube.com/watch?v=tX_x4iYvspU&ab_channel=griffpatch