This is a tool-assisted speedrun. For more information, see http://tasvideos.org/2367M.html
In Eversion, Zee-Tee is on a quest to rescue the princess across multiple realms, each one more disturbing than the last...
Despite not collecting all the gems, this run by Bernka achieves the good ending by using a glitch to trick the game into unlocking Level 8 with minimum gems.