I didn't like it, but here's how Ver 2 can improve
My tips for improvement are pretty much the same as everyone else's. There are others, but these were my big ones.
First and foremost, get rid of the glitches. I'm sure you know what they are by now.
Second: Don't just get better character graphics... get multiple character graphics (example: have a casual meeting graphic, a kissing graphic, an on the date, etc.)... make sure that they are the same or at least a similar art style too.
Third: Don't leave out any of the original girls (Aeris, Yuffie, Lulu, Riku, and Paine weren't there) and don't add in your own characters if you are going to leave one out.
Forth: Give the girls depth.... All of them really just said the same thing and all of it was in one line. (With bad spelling; not that mine's much better) And add the option to lower the girls' happiness with you outside the dating simulator. If you say something she doesn't like it lowers how much she likes you. Or if you go too long without calling/talking to her she loses interest in you.
Fifth: Make the stats worth something. You can add a fighting option and your stats and affect your compatibility. Say you pick Cloud, now FFVII girls are more attracted to you, and say your strength stats are high. That means, for example, now Tifa is very interested in you to start; Aeris likes you but takes more romancing; Paine could like you easily; and Lulu is reluctant to talk to you.
Last: This is the mature section... so let us see the actual characters having sex! That's why us perverts are in here!