I propose a misc category 0 Star speedrun it is possible with versions 0.6.7 and 0.6.8 link of some speedrun and by the way I recommend to separate mario and luigi

separating mario and luigi makes no sense whatsoever since their physics are exactly the same

as for 0 star, i believe pre-v0.7 categories aren't going to be added (although i believe there will be a new intended way to finish with 0 stars in v1.0) you can see a 0 star leaderboard on the wiki though https://b3313.fandom.com/wiki/Speedrun_Leaderboard

luigi slides a lot more and jumps higher impossible for me who slides a lot less and jumps a lot less high