I'm really glad this it out! (I've been waiting for it in a forum lurker fashion)
I'll be trying out the mac download (it seems to be working so far), and I'll update this with my thoughts afterwards!
EDIT: Maybe I spoke too soon?
The game crashes at the point in Tia's path (you're downstairs with her), Tia just said "You're pissing me off!"
There's a line after when just a 'W' appears, then the game freezes. I'm unable to get a traceback message, because the application stops responding (maybe this is a result of it being on a mac?).
Otherwise the other girl's routes have been enjoyable from what I've played through so far.
EDIT (again):
Just some other small critiques (I'm not doing a full review until I can play Tia's path, because then a chunk of my critique probably won't still exist),
First on the writing:
The Bad:
Mainly in the beginning until the point where the story really starts to go forward, the writing is difficult. I was incredibly confused in regards to whether Kevin knew a heck of a lot about the orbs (mentioning his 'friends' makes one think he is looking for Tia and her crew, and the woman in the red coat throws a stone in that direction too), but later incidents show he doesn't get it...Then other incidents imply that he does...And it ends up being very very confusing for the reader.
I think it might be the large cast throwing things around and making things difficult. Zyra's path was a lot more clear to me in terms of the writing.
On Kiyoshi and Nate; I liked them, but at the same time, it felt like you didn't do anything with them, making me wonder if there was any purpose at all for including them in the story. Nate perhaps opens a possibility for a romantic rival for Yoko, as does Kiyoshi with Tia. Maybe in the original comic they had a bigger role, but just using this game as a reference, they seem very neglected in terms of character development...Which makes me sad. I really liked Kiyoshi. =P
The Good:
Likable characters, who, with the exception of Nate and Kiyoshi were all very distinct. There were a few moments where I felt a bit of a pull at my heart strings as to what choice I should make and had to think about it for a bit; which doesn't often happen while I'm playing visual novels. :]
The story had a very interesting premise, which left me wishing you had explained a lot of points more (this visual novel seemed very much like an introduction to a story; a first few chapters meant to draw you in, that gets cut off before everything is fully explained). So cool story! It makes me want to check out the comic!
And on the bad endings:
I wish you had put more into them, Vatina. They were all pretty much the same 'oh, she killed the protagonist.' I had to try to get them. Generally I like to look at bad endings because they reveal more about the characters. But these bad endings didn't really fill me with any regret or provide any insight as to what I should do to get the good ending (should I have gotten the bad endings by accident); but most importantly they just seemed unnecessary. I've always been a firm believer in that if you have bad endings, you should do something with them to make them...I dunno, motivational to get a good ending? They really seem at this point, to only be inserted for the sake of having more potential endings, and compared to the thought put into the rest of the writing in the game, I really just wish there was more to read. ;~;
Again, overall I really enjoyed the game. I'll give more critique when I'm able to play the Tia endings.