It would be nice if Drenn, or another ASM hacker could fix that cutscene, removing the "go to the castle" from it.
As far as level numeration, it's also used in Best Times screen, so if we re-number the east levels in the order you unlock them, we'll need to do some ASM to the Best Times screen so the times are displayed correctly
Also:
In the Volcano's Base, the Green Fire Snake chest is in the Red Mine Cart chest area, and therefor requires the Grassland's Red Climb-The-Vine chest, containing minecart wheels inside.
Problem is, these chests are optional. I've seen players who didn't get the wheels, and then got lost looking for the snake.
Should we fix this, by putting the Minecart and Fire Snake in separate areas?
I'm pretty sure it would not screw up anything with The Temple's hints, as the game sends you both to the Red and Green chest only if you got the minecart wheels. If we put them in separate areas, the game still wouldn't send you to the Volcano's Base until you get the MineCart wheels, but... Since the treasures are optional, I think it's ok.