The world building in this story is extremely well-done, with a vivid and detailed depiction of the King's modest apartment and the contrast with Darius's vivid and imaginative dreamscape. The description of the falling-apart walls, the smell of alcohol, and the mildew growing behind the sofa all contribute to a sense of decay and neglect within the King's home. In contrast, Darius's dreamscape is described as a vast and fantastical realm filled with giant fire-breathing dragons and other mythical creatures, offering a sense of escape and adventure for Darius.
The character development in this story is also well-done, particularly with the portrayal of Darius's troubled relationship with his abusive father and his coping mechanism of escaping into his dreams. Darius's father, Malcolm, is depicted as an angry and violent man who takes out his frustration on his son, holding him responsible for the death of his mother and using him as a punching bag for stress relief. Darius, in turn, has learned to block out his father's words and abuse, and finds solace in his dreams where he can be the hero of his own adventures.
However, it is important to note that the themes of domestic abuse and suicide in this story may be triggering for some readers. The depiction of Malcolm's violence towards Darius is disturbing and may be difficult for some to read. The mention of suicide as a way to escape the abuse is also a heavy topic that may be difficult for some to handle. These themes are handled with sensitivity and care, but it is important to approach this story with caution due to the potentially disturbing content. I'm glad you have put a warning at the start.
Overall, this is a well-written and engaging story that tackles difficult and important issues. The vivid world building and well-developed characters make for a captivating read, but it is important to be aware of the potentially triggering themes.