Hello, joaomarques123!
Apologies for the delay.
In version 0.1.3, the main mission ends there.
Regarding the NPCs, yes, they are quite challenging, as the equipment system (with rarity, runic forging, and equipment enhancement subsystems) and the improved combat system (with skill rebalancing, NPCs, among many other additions) are still in development.
I hope this has been helpful to you.
Thank you very much for commenting, and have a great day! 😊