Thank you for trying my little concept jam game :)
Yellow are actually mashable arrows. Every time you press them you take 1 second off the timer, and you can press them as much as you want!
The narrator was hinting at it : "Through dedication and intense repetition you will find the secret..."
There’s the risk of clicking that button too much and failing a check though, felt like a cool little risk/reward mechanic to add the game.