I love how you use light in your work and I also like the colors you chose and the overall aesthetic. These assets would be ideal for a horror game, so I would really like to see more assets that continue down this path. So maybe some ghostly beings, misshapen, possessed characters, subterranean ghouls, general dark figures, etc. Additionally, pickups that could be used to piece together a mystery would be good. Some ideas might be handwritten notes, belongings of a missing person, blood-stained clothing, esoteric books, etc.
Lastly, if you start venturing into any top-down assets that could be used in a horror rpg, please do let me know as I would likely be willing to commission this work.