Ehm... Aside from the landing part, which I was already wondering about in the previous chapter (with how he designed the 'landing gear' so close to the ground), but how did he even bring all the 'loot' from the dragon valley home??
.... Uh-huh, yeah, let's blame your mental regression on age...
I also wonder what you need to do to improve your mana pool and skills and such? Just repetition? Questing? Items?
Seeing as how the otome game was apparently a 'pay to win' type game, there may be some stuff that is hard, if not impossible to do.
Oh well...
That's one big tall tower... Should I do the obvious 'compensation' line?