In games, most have challenges in order to compete and test your skills ability. However, some games can have a bad challenge. This means that the challenge is too hard or too hard to complete. Also, that the player can have a less chance of winning than losing.
I used Flappy Bird as an example because it does have hard task. You have to tap the screen to make the bird fly and you have to fly past the tunnels without getting hit by them. If you do hit them, you die. People get frustrated when they die and they have to restart all over again. The bad challenge in this game is the difficulty. When I play, the challenge remains the same as always and I always have a more likely chance of dying than maybe beating my high score. At least the game grabs my attention and I alway do end up playing it over and over again.