Beautiful execution, very well done. I really enjoyed this. The genuine pang of sadness I felt when I reached "the end of the demo" was a strong indicator that it was a great experience.
I think it might have been stronger if the enemies moved around or perhaps if there were more danger - at no point did I ever feel threatened. Could be fine, the overall experience was very strong.
Character building was impressive but felt unnecessary, I think the effort in creating all the different character portraits could be better served created more monsters.
The overall CRT aesthetic, black and white treatment, etc was just perfect. Also the choice of cassette tapes, really into the Top 40, huh :)