So I am very intrigued at this speedrun and it looks semi-tech heavy. But I cant figure out the bhopping. Is it like the other source games? How do you "slide" down the wall? Would be happy to run the game if things are more clear, Cheers.

-Confetti

Yeah, it is like other Source Engine games, quite similar to Portal 2 actually. Velocity is capped at 300 so you have to go in a straight line in order to go faster. If you want to accelerate as fast as possible you have to use your +speed key and W, then A/D strafing with quick left-right movement with your mouse. Syncing your strafes is important. Also you have to scroll a lot since the jump height is really low in this game.

Not sure what you mean by "slide down the wall". I guess you mean the skip in office? That one is a bit tricky. You align yourself with the vertical clipbrush and hope to get stuck by pushing against it. If you get stuck you can carefully release and repress your keys.