Baba is You does this by giving you a bunch of tools to solve a level, then taking away one of them (or neutering it) and challenging you to solve it again as a

Baba is You does this by giving you a bunch of tools to solve a level, then taking away one of them (or neutering it) and challenging you to solve it again as an Extra. It's fun because it makes you realize that you already had the power for a more a different solution, but didn't notice.