Press the green flag and space to start. When the amount of movement becomes 10, there will be a slap so press the space before or when that happens to not get bruises... Also, every time you reach 9 amount of movement, you get a point so don't just spam the space key. Finally, if the amount of movement is 1 to 3, the screen is green. Yellow if 4 to 7, and red if 8 to 10.
Made this for my science class (don't ask)