Update on my Kobold Dungoen

So i was able to get the main plot points i want and made a simple Dungeon Crawl but not the probelm that stands before is "Other then the fear of Dming" are 4 things 1. idk if i have enough traps in my dungeon 2. if i should place some some hiddent secerts and hidden rewards 3. if i have to many monster in the smal location and finally 4. if my boss has a cool mechanics and trying to find a cool concepet for it. and i wanted to see if the placement of my NCPs was a good layout choice as well