It’s called “Screentendo”. It’s a desktop application built by Aaron Randall, and it allows you to turn a selection of the screen to something similar to a playable level of Super Mario Bros.
These groundbreaking video games changed gaming forever and drew in scores of fans in the process.
From Toadsworth to King Wart, several Mario characters have been sidelined by Nintendo.
Besides leading his own franchise, Mario has appeared in many crossover games that capitalize on Nintendo's greatest hero.
