This is a tool-assisted speedrun. For more information, see http://tasvideos.org/2397M.html
Braid is a famous indie platform game with some unique puzzlework. It was originally released on Xbox Live Arcade before being ported to other platforms. A major feature of the game is the player's unlimited ability to reverse time and "rewind" actions, even after dying. The game itself was intended to be an artful deconstruction of traditional video game concepts.
Many tricks are used