Overclocked is a very short and superficially simple homebrew NES platformer that was developed for the ByteOff! 2020 Game Jam. You control a mouse cursor, and your goal is to get to the floppy disk on the other side of the level. A second player can also control the floppy disk itself and both of you can work together to make contact. However, if you or the second player doesn't move in a certain way the game dictates, both of you will be reset to your starting positions. Sounds frustrating, doesn't it?
LoganTheTASer nevertheless masters the rules and completes the game using only one controller in record time.
You can get the game here.