There are two shields that are on the opposite sides of each other, you can rotate them around the Potato using a finger to rotate in the direction you want.
Each shield only guards the potato from the orbs in the same color.
The goal is to protect the Potato to keep it safe as long as you can. Score is the time (seconds) that you protected the Potato, it is in a special representation because of the limitation of the game jam (no-text). It is represented in an analog way (instead of text)