Oh I've played the CS wiiware, I've just never attempted a 3hp hell run on either the PC or the wii (on my 3 hp min items run for the PC, I'm still stuck at the core, since I gave up a year ago there).
And yeah I'm not a fan of the "Oh Yeah!!" either, since it's both a disgrace to the Aeon Genesis (original) translation, and it actually is not a more true translation of what balrog really says, "Doryaaa!" (which in itself, pretty much has no meaning, kinda like Huzzah).
Also the boulder isn't really an interactive object, it's like a solid lump, but it gets used in cutscenes, and....
Maybe I shouldn't say anymore, wouldn't want to give away the whole premise of the level.
I wish I could give you guys more of a commitment/release date for the next chapter, but I don't work on the mod as much as I used too, and modding has somehow become harder/more complicated than when I first started. But I hope to get chapter 5 done eventually.
Oh and the "hard" mode of WTF story is actually the standard mode of WTF story. It was made to be played at that difficulty, since that was the difficulty I found most fun. However, other people voiced their opinions on the difficulty, and I can imagine that this mod is much harder when you don't know exactly how to beat it and how it was designed to be beaten (I've seen some players make some rather interesting, complex jumps in the first chapter at parts, where a simpler jump would've worked, and would've also had a higher success rate).
Anyways I've got to get back to solving differential equations now.