I'd suggest polishing up the existing art since it looks incomplete and adding in better background art that can be drawn like how the CG's are drawn.
Also, the writing for the romance could be more fleshed out. With Kael the romance felt like it needed more time to develop, and it felt like it kinda happened too fast despite his trauma and how he and Elara's story was going. If you make the pace a bit slower and more natural, allowing them to have more time together and more conversations, you could really convince me they love each other in the Reverie ending.
With Corvin, the romance always felt so forced. It gets a bit better later on but part of the reason I went with Kael first is because in Corvin's Paradise ending he still makes it so forced, and I never felt like going with him fit the plot anyway since Elara wants freedom, but all Corvin does is take that away again.
I'm probably missing context for Corvin since I didn't get one ending of his. It's the only one I'm missing in the game.
Other than that, I absolutely loved the world building and your intricate writing style. I was hooked from the first few sentences. I hope this feedback helps!