How do I add mipmap settings to my game?

Basically, the game I’m working on has an art style that looks pretty bad when mipmapped. However, I want to add an option in my game to enable mipmaps for people with slower devices. Is there any simple way of doing this, or would I have to create a script to go through every single texture in my game and enable/disable mipmapping?

Good day.

Go look for tutorials about this, there are several of them, you will find there your answer.