Well firts that nothing I know this is a demo but... If you will make a demo, include at least 1 NTR scene, I can only play the 1st chapter and nothing happens, I can't say if there are something to improve or rate if I can't find nothing of content.
Second, maybe to make the game more interesting you can try to add some "audio messages" (I was thinking in "call phones" but if there are not response from the users isn't a "Phone call" unless that the user can answer a "phone call" with written messages...) that maybe can make the game less boring with only text and some images.
And third, talking about images... The game need more of it, lots and lots of images, only in the fist chapter there are only one image (And wasnt NTR, only the girl naked, very boring, sorry but I feel it like that).