Heyo, I'm pretty sure this game is dead but I wanted to try and do some runs myself, is there anything else I have to know to get a good time except for copying the tricks from the fastest runner?

Not a bad way to get started, it's pretty easy to follow along. For a more in-depth explanation of the run, Ecdysis did one for ESA Corona Relief in 2020 that's very informative:

I've done also a bunch of marathon runs that might helpful, I plan on making a tutorial soon but a lot of the tricks and route are pretty straight forward, pretty much just do what you see

Alright, thanks for the infos! Will look into it.