I just noticed there is a katana only submission under "hacker" by mistake, the run is actually on the level "Fall". (there is no hacker level for katana only)

http://www.speedrun.com/SUPERHOT/Hacker

P.S. is there a way to directly message the mods about stuff like this? I haven't been able to find a way to PM people here (I'm new to speedrun.com)

Sadly, the site's PM system has never been functional, though there is a button for it in the top right. Thank you for pointing it out, though!

There is a stickied thread for cheating, complaints and suggestions, better off posting things like this there in the future. The mods will see this either way though so it's fine.

Also, there isn't a PM system yet, it's been in the works for a while, that's what the message icon at the top is gonna be for.