There are roughly eleventy kazillion mobile clones of that helicopter game. However, Flappy Bird is the first one I've seen that has a constant difficulty. Most

There are roughly eleventy kazillion mobile clones of that helicopter game. However, Flappy Bird is the first one I've seen that has a constant difficulty. Most things start easy, get increasingly hard, and arguably at some point become impossible. High scores become primarily a function of the RNG at the skill ceiling. In Flappy Bird if you die it's 100% your fault all the time which makes it quite compelling to try again. Also it's a total Black Swan event and should be treated as such.