Vietnam-based developer Dong Nguyen developed Flappy Bird in 2013. Its compelling gameplay and easy mechanics made it popular, but its difficulty and frustration caused controversy.

Flappy Bird lets players guide a little bird through openings in pipes. Timing and coordination are needed to pass through the gaps without striking the pipes or ground. Passing through gaps gives points, and the goal is to score the most.

Flappy Bird is notoriously challenging. The game is notoriously difficult, with players struggling to keep the bird flying and avoid obstacles. This led many players to become addicted, aiming to beat their own or others' high scores and posting their results on social media.
Although difficult and unpleasant, Flappy Bird became a cultural phenomenon that captivated millions of gamers worldwide. It also spurred questions about game design, addiction, and mental health and left a lasting mark on mobile gaming.