I just played your game and I thought it was nice. Quite fun to play. ^^
The story was an interesting one--really liked the premise. It was pretty simple but that makes it enjoyable.
Some spoiler filled thoughts/observations (writing them down as I remember them):
Ending 6 is labeled wrong. The "Conclusion" ending is labeled as "Ending 5" instead of as "Ending 6". That confused me at first because I was aiming to get all of the endings (which I did, by the way~!) and thought I was missing one. >>; Thought you'd like to know this.
Rima being a bit crazy and prone to violence (if pushed that way) seemed oddly fitting using Illya's sprite. Haha.
During the scene where you talk to Yuka during Sports class and she says she sees the teacher and runs off I was half expecting Taiga's sprite (in the "dojo" outfit from the 'Taiga Dojo' sequences of "Fate/Stay Night") to come popping up among them with an angry RAWR face. But, sadly, this did not happen. Oh, well. XPP
Kotomine as Yuka's father was oddly fitting, too. Though I still find it difficult to see him that way. XD
Caster as your friendly neighborhood fortune teller? That made me laugh. Haha. But, again, still fitting.
I had a bit of trouble getting the last three endings. It was ridiculously simple once I figured out what I had to do (jeez, I mean, even the fortune teller lady hints at it big time!). But I'm just stupid, I guess. Go me.
I wasn't fond of the music with words in the ending where you go to Yuka's party and get the "Fate" ending. I mean, it was winding down to a close so music like that--which sounds almost like a theme anyway (probably is, considering these songs come from somewhere, as you've credited them)--but it still felt a little out of place to me. Oddly enough it didn't feel out of place when I got the "Conclusion" ending with Nagato going into his little monologue about fate and the fortune teller, etc, etc. Probably because that ending felt a little more...appropriate for the music? I'm not sure. Maybe it was because everything felt like it really wrapped up nicely. I dunno.
The music in the opening really threw me off. It kind of makes me expect something magically epic. I mean, I know there's fortune telling involved and we get statements about fate and stuff, but...I don't know. It's like when Yuji kept saying how Rima wasn't 'normal' I kept thinking that she might have some really screwed up power that made him hate/fear her for some reason. Like something pretty bad. It just turned out she had slightly violent tendencies from feeling abandoned and getting beat on at that nasty school.
Oh, and one last thing. I was also a bit confused at first because I didn't realize that we weren't looking through Yuji's eyes. We were actually looking at him the whole time. I wasn't sure about this at first but then it kind of grew on me, especially considering we got to hear the thoughts and asides of other characters we wouldn't have gotten to had we been seeing the story strictly from Yuji's POV. So, I say: Nice one! ^__^
That's it for stuff of potentially the secret spoiling nature, I guess.
Oh, and I noticed quite a bit of typos. I'm not gonna list them because I can't exactly remember where they all were. They're there somewhere.
Anyway, nice game. I really enjoyed it! ^__^
) life. 
