you can wrote it here or maybe wrote the dev a pm. I´m pretty sure the dev would see it and maybe answer
Well, there are three key points that I feel could be improved to increase the quality of the game; graphics, writing, player choice.
The art leaves a lot to be desired, I assume the dev does all the art him or herself and while it's decent, I feel it needs work. The biggest issue is the character art, I don't care how every character faces the player, I think it would be more natural and would make conversation scenes better if characters could face each other. I feel the existing forward-facing art should be used mostly for characters text box art (which they already are used for), outside of animating characters when they turn or move around.
I feel the writing is overall pretty good, most characters are characterized very well, but aside from correcting mistakes in the writing, I feel it could be improved a little from revisions.
My last point is player choice. So far, the game has zero player choice. All choices presented only have one option available with a weak promise to add the other branch in the future. Not only do I feel those choices need to be added, and not just make them a game over scene as that doesn't actually offer any choice, doing so would be an admission that you only wanted the story to go this way. Furthermore, I would like to see more player choices, even if they are relatively minor ones. The story has plenty of places for the player to have Kim or Ren do one thing or the other.