I downloaded this visual novel and found the visuals to be astoundingly beautiful! The music was lovely and I was impressed in general by the layout and the controls in the options menu. I was enjoying the storyline for the short time that I kept with it. Unfortunately, there were two things that bothered me enough that I stopped reading. I would like to share this feedback with you, and I hope you will find it helpful to your growth as a VN creator.
The first problem I encountered was that the English does not flow well. This usually happens when the writer speaks English as a second language, and I'm guessing this is the case here? I am a native English speaker and a person who appreciates the beauty of language used to its best potential. I am worried that you will read this review and feel defensive, and be angry for this criticism. Of course I wouldn't demand that anybody have a masterful grasp on a second language, but for the VN this is a problem that can be resolved by asking for help from other people. I also acknowledge that for many readers the grammar and flow is probably good enough. For me, the awkward phrasing, unnecessary explanations, and occasional but noticeable mistakes kept pulling my mind away from the story, and sadly I couldn't let myself fall away into the unfolding world of Nusantara. The help of a talented editor who is a native speaker could have brought this VN to its full potential!
The other thing that I found uncomfortable was less important to me, but I'll mention it anyways. That was the visual effect of the fast-paced in/out fade of the picture (for example, during the dream scene and the drowning scene at the beginning.) It did accomplish a feeling in my body of suspense, but I found it to be a bit too stimulating. It hurt my eyes and I wondered if I'd get a headache from watching it. It would have been comfortable for me if either the pace was slower, or the blinking happened for maybe half the time, or possibly both.
On that subject, I found the shaking screen to be a really cool effect--but devastatingly overused. If the picture only shook at the most important of times, it would really draw attention to those moments. Instead, it was happening every minute or two, and the novelty wore off quickly. There are many different ways to convey the shock of less important surprises.
Again, I hope my feedback is constructive to you as a creator. The art you have made here is beautiful, and to judge by other reviews on the page, the storyline sounds engaging. I wish you the best on your future projects!