If you can decide which game to play click the green flag then copy and paste a random link and hope its works.
Here is a link that actually works and I found after searching around like a bunch of links https://scratch.mit.edu/projects/469927690/ https://scratch.mit.edu/projects/412870010/ https://scratch.mit.edu/projects/400768971/ https://scratch.mit.edu/projects/483890677/ https://scratch.mit.edu/projects/470639399/ https://scratch.mit.edu/projects/417162147/ https://scratch.mit.edu/projects/446438297/ https://scratch.mit.edu/projects/447502488/