In the Game Balance Concepts course, someone posted a link to this video which explores what games would look like if they included a super easy mode.
In terms of game balance, sometimes different challenge modes are offered to ensure that as many people can enjoy the game as possible. Typically, Easy mode is available for more casual players, while harder modes offer something for experts. You don’t want to frustrate the player, but you also don’t want to bore them.
At what point does a game become ruined by offering less challenges, fewer obstacles, or more power-ups? Does offering a different challenge mode require the same amount of work as an entirely different game, or are a few tweaks often enough?