If you frequently scored below 10 on Flappy Bird, then you'll probably have a rough time with Duet.
Duet is part of an increasingly long list of games that are all about controlling gameplay, with a very simple game concept that's extremely hard to master. The basic principle? You must guide two rotating vessels around a single axis to avoid geometric obstacles that scroll across the screen.
Tip: Do not lose your temper at the expense of your phone!