made it up to the ledge ( https://gn.s-ul.eu/gcCdfD4O ), but i don't think it's possible to go much further up considering the furniture tower blocks you. can't seem to get any grip on the backside of the bed up there, either...
@Lorn: very good ideas. they should make this quite a bit easier to do.
@Apok: fair, i haven't watched those videos yet. i'm fairly sure it should save some time if done optimally, though, so i'll mess with it some more. it's probably not worth doing unless you have a sub 3:30 time already, but it's a pretty fun strat, i think.
put up this video of me skipping the furniture tower via launching up from the cardboard boxes and up through the little hole before the orange. it seems like a viable strategy, even if it's pretty hard to do.
edit: seems like you can launch yourself right up the hole from the lamp, instead of trying to fit the hammer in there like i did in the video. in addition to that, you can get your hammer directly on top of the roof after launching up from the boxes for another timesave, but i can't get it consistently at all...