some more clips and skips, and holding the window also seems to keep your height when walking off ledges so you can stack on any staircase. some enemy clips are bad and some are free

found a way to clip past lasers but you have to hold the window + more enemy clips and skips

nice find. looks like it only works with bugs for some reason and when not slamming? every time i tried with Marvin i landed the roof and it didn't end the level. but yea this should save a few seconds of waiting for the door to open

You only have to watch the first 2 cutscenes, all the rest you can skip