RTA Guide/0/1 Star
There are no restrictions. All forms of BLJ are allowed. Timing starts from power on and ends when the big star is collected at the end of the game.
SBLJ tutorial (1 Star)
Also see the video below for a tutorial in Japanese. https://www.nicovideo.jp/watch/sm30902792
If you don't get DDD skip, then get the sub star.
DDD Skip Tutorial (0 Star)
DDD Skip Strats based on your door position
Also see the video below for a tutorial in Japanese. https://www.nicovideo.jp/watch/sm32145162