Nah you're fine, no worries. But as for finding some major timesave, that probably would not happen, unless if somehow something new was found, but I doubt it. Leg Early (which is the thing I did in the video) probably could have been quite a bit of a timesave had the game not crashed during testing. However, it could be possible that there is something we overlooked, even though we have already tested a bunch of theories in multiple sections of the game. There are maybe a few different things we could try to see if we can save time, but most of the main timesaving theories (Sophie/Drake Redcrest Skip, Leg Early, etc.) all had drawbacks, either a loading zone was not loaded in yet properly, or the game was just coded in such a way that it disproved what we thought we could do. It's unfortunate, but maybe not all hope is lost.

Yes. There aren't too many things OoB in other rooms though, mostly just empty space. In the basement, however, all 3 of Captain Plankbeard's treasure maps are there (although you can't pick them up) and there is a sleeping text animation (the Z's that go up which are normally used by characters that are sleeping) underneath the room. Clipping into the chest in the bedroom has also been tested, as you can see here (Warning, it may be a bit loud.): However, this glitch would not be useful in a run as the one time that we can get a chance to do it and beat the game crashes the game. (due to the mother being in the room at that time) So yes, you can say that this has been tested for just about everything.

I believe it's something like R pumping on a certain frame as you collect the pearl, it's a bit screwy.

Generally, USB/SD loading is not allowed for most games, but this game is an exception. If you want to know what to use however, then for USB loading it's Dios Mios 2.11, and for SD card loading it's Dios Mios 2.10 Lite (you have to install the wads with a wad installation program)