I have just started but since this game is mostly uncharted territory when it comes to speedrunning there will be quite some routing/optimization etc., would be fun to get some help if anyone is keen!
So far I have started jotting down a list of all the items available, what unlocks what, if the train can be used to quickly travel some specific route etc and i'm gonna use this thread to document my progress and for you guys to read if there is any interest.
I've been looking online and I found some run around 1h done by a player and a TAS run at 38m~. I am quite sure that those times could be beaten through smart use of paths since the TAS run doesn't seem optimal at all (although ofcourse, perfect input).
When i jumped into an emulator and remembered that as a child i found a bug that allowed me to clip through a wall in the starting area, allowing me to travel up a floor thus not having to go to the bottom of the village to get the spray can - I hanve't really analyzed if this could be used to trim some time off the clock (feel free to let me know if you can think of something) but even if it isn't, im sure that there are similar cases in the game where you could clip through walls to possibly skip using some items, or enabling to use them out of order.
Picture of the area: https://imgur.com/KP3aQ7W