Hey. I also planned a TAS for this game at one point. I managed to find a few tricks and other oddities for it. Nothing supremely useful, I think, but the game does have glitches if you start digging into it.
https://www.youtube.com/watch?v=IReu8vkN8wQ
I also wrote some speed notes on the game... but the notes are in finnish and it's been too long now for me to make any sense of them since I can't remember the game that well. I'll have to watch that TAS test and see if I can then piece it all together in my head.
EDIT: here are some potentially useful excerpts from the notes:
- "Potions class: you can skip the final gnome section by running past the barrel."
(I think this refers to the part at 05:50.)
- "Hagrid: on the way there, you can do a small warp using the score boards."
(I think if you examined the scoreboard, you teleported near the exit. See if this would be faster?)
- "Hagrid's Garden: you can slip past a moving block diagonally and shoot it in place earlier than normal."
(This probably refers to the block you can see in the screen at 08:26 for instance.)
- "Avoiding Snape: at the moving blocks you don't have to destroy the urn, you can slip past it."
(I guess you do this in your test run already.)
- "Greenhouse 1: at the end of the left path there are two pits and a moving block. You can inch to the block by the side of the wall, unlike normal."
(But then I also wrote that this might not be useful after all. So, eh... I have no idea about this one.)
- "General note: there is that shortcut between 4th and 7th floors. How often can it be used?"
- "Worms: to the down-left of Hagrid there's a log you can slip past from the down-right."
(If I'm not mistaken, you do this in the run.)
- "Doggie: you can walk past the conversation... but this is likely slower."
(???)
Just something that came in mind. Would you save time whenever you have to learn a new spell by first failing two times, then learning the spell, then failing one last time? Or do the X's reset after a success? (can't remember)
Also, I agree with JLun that the stealth sections can be potentially very broken. Do your darnedest to get past everyone in record time!