EDIT: Beaten to it. I shouldn't take so long to post.
That other improvement with skipping the song may be worth looking into further, though.
EDIT2: It can't be an input thing, as it's all lag frames, so it'd have to be something done beforehand...
Ah right, I forgot that TAS work differently.
But as far as the Iron Sword skip, I felt like holding a direction before hand made a difference? I'm not sure, it never felt consistent.
Hey guys. I speed run this game about 2 months ago and was excited to see this game got a new TAS!
Anyways, there's at least 1 way this TAS can be improved on:
1) Final boss - when he dies, you actually don't have to wait for the last elemental to slowly float down off the screen. To do this, you have to kill the final elemental waaaaay off the screen. This triggers the final cutscene instantly because the game sees that there's no more elementals on screen. Here's a video to demonstrate this, skip to 9:15:
Link to video
2) Assembling the Iron Sword skip - there's a way to skip the message half way through the song... although I've never been able to do it consistently and could never do it on my real runs. Maybe a button needs to be pressed on a certain frame? Anyways, there's an alternate consistent way of doing it, but you need to have a spell with you, so that's not relevant here. You can check out 6:32 in the video to see what I mean.