Kirby's Dream Land is a classic platforming game for the Game Boy and the first game in the long-running Kirby franchise. As it is the first game, it lacks certain established elements, most notably Kirby's signature ability to gain the abilities of the characters he eats. In the magical place known as Dream Land, the self-appointed King Dedede has stolen all of his subjects' food for a midnight feast. Kirby now bravely sets out to stop the gluttonous penguin and recover the food.
DarkRiolu27 and MUGG combine their efforts for this to create a run that saves 16 seconds over the previous run thanks to many optimizations that reduce lag and manipulate enemy movement and attack patterns, among other things. For more details, you can read the authors' notes.
The author has also made an audio commentary for this run, which you can watch here.
You can also watch this run being played back on a real console.