This is a tool-assisted speedrun. For more information, see http://tasvideos.org/3631M.html. TAS originally published on 2018-02-13.
Princess Rescue is a homebrew game that's inspired by the Super Mario series, even following the same general storyline (namely a princess gets kidnapped by a big evil spiked turtle). It is up to a lookalike of a famous plumber to save her from its clutches.
Mothrayas (http://tasvideos.org/Mothrayas.html) and EZGames69 (http://tasvideos.org/EZGames69.html) rescues the princess by completing every levels without dying a single time. If you want to see this game beaten in the fastest way, please watch the any% run (http://tasvideos.org/3612M.html).