Hey there.
Yes, the Chapters in the Game are mostly comparatively short when looking at other VN's, this is simply do to our general Style and pace.
DD, the Creator and Story Writer of the VN, is in origin a Manga writer, which lends itself well to him creating a VN which has a Manga style to its pacing and style.
We know and agree that we all would love them to be longer, which is slowly but surely happening, if you noticed in Chapter 3 when looking back at 1 and 2, but it generally will very likely not hit extremes like other VN's.