I Wanna Be the Guy is a freeware platforming game developed by Kayin in 2007, inspired by The Big Adventure of Owata's Life among other things. Described as a "masocore" game, it features unexpected traps designed to take the player (as "The Kid") by surprise, thus relying on trial and error to get past them. It also features a lot of sprites and music taken from other games. The plot is also straightforward, as "The Kid" simply sets off on an adventure to become "The Guy".
tokoroten-az3 improves the previous TAS by 3 minutes and 13.06 seconds, thanks to better optimisation and entering a glitched version of the credits, therefore no longer needing to dodge the final apple at the end, as they get cut early. The K (on Kraidgief) and E+N+D (at the beginning of The Tower) keys to skip those boss fights, per the JP ruleset, are used for this movie as well.
The RTA timing is 11:59.