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 becomes "The Guy" in record time, whilst using the K (on Kraidgief) and E+N+D (at the beginning of The Tower) keys to skip those boss fights, per the JP ruleset. Note that the input file extends past the credits, as there's one final apple that needs to be dodged, as it triggers a Game Over otherwise.
The RTA timing is 12:10.