Enchantments are limited right now, or should I say permanently since I can't get an update to this software to add more. Anyway, your sword should be fixed like I said. I changed the modifiers then changed them back so that it would refresh the values. Your sword should work fine now. As for the shop, you can get to it from the main city, but right now there is nothing there except an NPC to warp you back out again. Haven't made gear yet to put there. As for new spells, i'll think about it, maybe slightly stronger versions of what is currently available.
I also learned a new powerful tool while making this place, I learned how to create warper NPCs, so in the future there may be NPCs that can warp you to specific locations for a price in gil. As for the monsters to get a player up to level 80, I believe that I will make the current top floor of the tower of death the place for a few level 80+ monsters and add another floor and move the boss there, I can even possibly add 2 more floors, the good thing about the tower of death is it allows a lot of freedom for very easy expansion.