Move with the arrow keys and sneak under things with space (hold to crouch down and go under things). You are either the hider or the seeker. If you are the hider (blue) you will have 10 seconds to hide under something. To hide under something hold space to crouch. When the seeker touches you, you lose. If you are the seeker (red) the screen will be black for 10 seconds. Then you will need to go under things to find the blue cube. If you are close to it an arrow will point towards what it is hiding under. When you touch the blue cube you win.
Music made by me on chrome music lab: https://musiclab.chromeexperiments.com/Song-Maker/song/5591102933172224 cooltext.com for the text