This is a tool-assisted speedrun. For more information, see http://tasvideos.org/3204M.html
Ristar is a colorful platformer with good music.
In this TAS, the author uses a password to play only the bonus levels.
This run is slightly longer than the one it beats (http://tasvideos.org/1666M.html) due to longer (and more accurate) loading times, but it's faster in actual gameplay.