Played this over a year ago, I think, so now that I have an account, I'm making sure to comment on my favorite visual novels!
I really like the worlding and lore of this game, along with the visuals. It's difficult for me to choose which among the three is my favorite, as they all strike me in different ways. Even the non-romanceable characters are captivating, and most everyone there was really like family. (I forgot their names and don't have enough data to re-download right now but) I find it adorable when the couple with whom Tamara stays bicker. The story is also funny in just the right places, as I remember the brother figure being protective of his wife when things got bad.
In terms of areas for improvement, I think other comments have already brought up Rama's characterization. I guess something that could be done to help us empathize with Rama more is to spread out more hints of his former love throughout the other routes, or in the general route. Think of something as small as villagers comparing Tamara to a girl "who used to live here" or a child wondering "why does Rama wear a feather when he's not married?"
I suppose right now your focus is on your new game, but just in case this suggestion ends up worth something one day. :)
I also played the demo for Nusantara: Bermuda and the art is as amazing as ever, if not better. It's definitely funding-worthy. :) Good luck, SweetChiel!