I've been practising the segments individually, so this is my first complete run, I was trying to be as perfect as possible with each individual segment and got pretty dang good at Factory and Hotel, but after a billion times making it 20 minutes into a full run and then restarting because I made a mistake or died, I decided to just do one full run and get it over with, so I at least have something to submit and compare against in the future.
Also worth noting that I haven't actually watched any speedruns or strategy vids for K0 (other than how to do the first Club sequence), I just played through it a couple of times and went with what I felt was fastest, so I'm 100% certain my routing is garbage. I just did it because it felt like an extra layer of fun challenge to it, doing it pretty blind. That being said, I will definitely be watching more runs and learning the routes and strategies better going forward, this game is insanely fun and I'm enjoying replaying it over and over. Clearly could do with a lot of work, especially parts of Studio 51 and the later levels/bossfights. I also kept messing up The Jump on the upper floor of the first phase of Club so I just gave up and did it how I would do it in a non-speedrun just because it's faster to do that than fail at the hard strat a dozen times. Still, I'm pretty pleased with how I did in Factory and Hotel (despite the death), and I'm glad my first run was sub 1 hour (however close I cut it, yikes).