One random shot is flashing orange for 15 seconds, and the spinner is flashing blue.

Distract the monster by shooting the spinner; every 5 spins will add an orange shot for 15 seconds (if all shots are already lit, then 15 seconds is added to one of them).

Every orange shot attacks the monster for 1,500,000 points (the shot remains lit until its time expires, so keep attacking!)

Remember: shots flash faster when their time runs out.