Legacy of the Wizard (1987), released in Japan as "ドラゴンスレイヤーIV Dragon Slayer IV: Drasle Family", is actually a part of Dragon Slayer series. This is a nonlinear platforming adventure game, in which you gain control over one member of the Drasle family to explore the vast dungeon filled with mind bending puzzles and obscure secrets.
The goal of the game is to retrieve a powerful sword named Dragon Slayer, protected by four magical crowns, to kill an evil dragon trapped in the nearby labyrinth. Each member of the family has different abilities, and the portion of the labyrinth only he/she can go into to retrieve one of the crowns. However, this prerequisite was circumvented by the clever use of certain new glitches.
As a result, this movie is a 3 minute 41 second improvement over the previous movie by Walker Boh due to skipping two character changes, and a new route. We recommend reading the author's comments for further details.
And don't hurry assuming the low pace usual for this type of games: thanks to speed scrolls and luck manipulation to get them, it's possible to accelerate the character to surprising speeds, and this is taken advantage of in this movie.