A new video from Super Mario Bros. speedrunner Kosmic breaks down just how close players are to achieving a perfect game.

This speed run doesn't include the boss battle so don't fret! You simply need to get to the end of the level proper. Grab the clock and quickly spin into Kamek. Grab the star and long-jump over the ...

You can breathe easy: This speed run doesn't involve a boss fight with Bowser. Getting through this level with time to spare means collecting all the clocks you come to and ignoring the 1-Ups. Head ...