The Wit.nes is an NES demake of the 2016 puzzle game "The Witness". The game features a various collection of grid puzzles, with each one unlocking a new puzzle or a new area on the map. Some puzzles will have different symbols that signify different ways a puzzle has to be solved, such as separating colored dots or drawing different shapes with each line.
Despite being fully playable and having the support of Jonathan Blow (the creator of the original game), The Wit.nes was only released as a demo and never saw further updates.
FractalFusion improves on the predecessor movie by 00:00.72 seconds via new routing and largely thanks to a new solution proposed by I have no name to one of the puzzles. In addition to a faster completion time, this run has a side-goal of making as many 90-degree turns as possible, which ended up being 315 (see the submission notes for more details).
You can watch this run being played back on a console.