Try moving your nose around the stage to see the effect. Move closer and farther from the camera. Tilt your head left to change the costumes randomly. When prompted, choose if you want to have a flip effect on the costume changes or not (may not be good for photo-sensitive viewers). Look inside and remix to create your own interactive scene.
A parallax is where the movement of a controller (often a mouse, but in this case a nose), controls the viewer’s perspective. If you like this, you might also be interested in my project "Pong Starter remix - with Face Sensing" (projects/1245097510) on my scratchlycaterton account. There, I use head tilt. You could try just a left right parallax with that method and see the results. When you use Face Sensing blocks, only your computer can sense your face. None of your data is stored or sent to Scratch or any other site, making it a safe, fun, and creative way to explore the possibilities of AI.