The rules are the same as rock-paper-scissors.
There's no real opponent — you're fighting against NPCs.

Three gauges gradually decrease over time. During the 60-second battle, tap three different commands to launch attacks.
Tapping a command restores the gauge of the corresponding color, so it’s best to prioritize the ones that are running low.

This is a reflex-based challenge where you fight while keeping an eye on all three bars.
With a simple rule of “survive for 60 seconds,” it's easy for both kids and adults to pick up and play.

Your combo count is auto-saved, so aim to beat your personal best!

There are also voice lines for different times of day, and special shoutouts when you pull off combos! (Available in both Japanese & English)

More details on the official game page of RPS Hunger ...