You have to hold down forward while pressing alt-tab. If you let it go, pressing it again won't make you start moving again
also... if the matter is just to skip the intros without interupting the course of the run we could just type 'darman' in the console during the loading screen of the intro
At this point, I'm convinced it's probably best to ban it, and not bother skipping the intros. At least they give your fingers a break.
I alt-tab out of the game during the intros sometimes just to mess with obs or the stream or whatever. Its funny, I often was surprised with how quickly the intro scene finished when i had the game tabbed out. Anyways, tabbing out may be unavoidable sometimes, especially throughout the course of a 2hr run.
Yea, I think if you have to, you can just wait a few seconds before starting the next level to make up for it.