Thanks for your review!
As I have mentioned in other comments, this was one of the first times I made a visual novel. It was all unknown to me in terms of art and programming.
So, since I didn't think it would be very relevant either, I finished it quickly so I could apply what I learned in other projects. (Which is why there isn't much depth or there are such abrupt endings.)
It wasn't even going to have a translation, but I decided to try to do it fast. So, I apologize for all those translation errors.
I'll pay more attention to future translations (and fix mistakes with updates), learn how to do things better, like endings or giving time for story/character development, etc. If there was a second part of Koko, I will try to improve the mistakes I made in the first part.
Thanks for your feedback!