A long running fan game, Mario Brothers: Tower of Doom has been in development for some years, spanning both Mario Maker and Mario Maker 2. This game has been in development by an anonymous developer since September 10th, 2015, and has switched locations from the wii u to the switch. Although it is only made up of mario maker levels as of yet, we can only imagine what it may become. It mainly consists of levels such as ghost mansions, 10 second challenges, and simple, yet incredibly aggravating courses.
"Have you heard about Super Mario Brothers: Tower of Doom?"