16:9

16:9 is an aspect ratio created in 1984. It started getting limited support in game consoles in the mid-90s, and started being used in the mainstream in 2005. Scratch normally uses an 4:3 aspect ratio, but using a Scratch modification called E羊icques, you can use a 16:9 aspect ratio in Scratch projects. A way to play the game in Widescreen without having to downloading it is going to this link

History of Scralaxy and 16:9
On January 31st, 2020, Scralaxy Team member LexDoesGames posted a photo of Super Mario Scralaxy running in widescreen. The photo showed the game's title screen extended to 16:9. After interest and praise, LexDoesGames developed the project further, and a week later, on February 6th, he released the first public build of Super Mario Scralaxy Widescreen Test. He is currently working on the next version of the project, and he says 16:9 will be finished and released in version 0.6.5.