The two Duel levels in Billy Frontier will test your dexterity and reflexes. The level starts with Billy walking into the arena and getting into a face-off with his opponents. As the music plays and the characters face each other down, you will be presented with a series of tap patterns that you must match:

At the bottom of the screen you will see a randomly generated pattern of circles and triangles. You tap that sequence out with the Circle and Triangle buttons on the left and right sides of the screen. When you successfully complete a pattern, one of the red dots at the bottom of the screen will light up. If you can light up all of the dots before the shooting starts then Billy will win the Duel. If you do not light up all of the dots in time then Billy will lose the Duel.

If you tap the wrong button then you'll hear a buzz and the pattern will reset to a new one and you will be penalized by one dot. Similarly, if you take too long to tap out a pattern then it will reset to a new one at the cost of a dot.