Answering the questions quickly...
1) Yes, the story's of interest - mysteries and time loops are enough to hook me.
2) Nice, clear, distinct / attractive character designs. No particular favourite as yet.
3) Art style looks excellent - it's distinctive, attractive, and stylish. All hangs together well - and quite a few backgrounds too, in a relatively short space of time.
4) .. yeah, I'll drop you an email or something as I'll ramble on
And having played the demo (obviously)
1) Windows. No particular bugs or glitches seen other than minor things which I'll note in email.
2) Overall impression - too short. Needs several more hours.
(Seriously - it's good, it had me hooked, and all too frustrated when it came to an end; I hope the full game has a ton more length to it as I enjoyed this so much).
3) Nice effect but a bit overdone I thought - keep the idea but make it more subtle?
4) Writing generally flowed fine, I had a few very minor suggestions to make here and there as noted in separate email.
5) Main suggestion/request is to make sure there's a lot of writing to read, really - I'd feel sad if this ended up being an all-too-short read, as the characters and setting deserve plenty.
6) The writing, with supporting thanks to the art