Use space bar to recalibrate or if you can't see yourself on the screen. Use your finger, arm, or even head to push the smiley around. The goal is to reach the big smiley while avoiding the spikes You need a camera on the device you're using to run scratch for this to work.
this is a project I did for for STEM (Science Technology Engineering Math)! I hope you enjoy! Please tell me in the comments if you liked the use of the camera. -DISCLAIMER- To play this game you need a camera in your computer.