Step 1: Make sure you are a Scratcher and Remix Step 2: See inside and create a maze, platformer, or just about anything in the sprite "LEVEL" Step 3: Design your players Step 4: Add movement scripts for player 1 and 2 Step 5: Redraw the backdrop If you want to make it into a platformer with multiple levels, create more sprites that need to be uploaded to the cloud. Some understanding of cloud variables is needed. I would recommend making a few simple mazes before getting on to that. To learn more about how this works, go here: https://wiki.scratch.mit.edu/wiki/Creating_a_Multiplayer_Game To learn more about cloud variables, go here: https://wiki.scratch.mit.edu/wiki/Cloud_Variables
