After viewing the small trailer on the homepage, I wasn't really sure what to expect. However, as I played, I enjoyed the game more and more as the story, although short, progressed.
I thought that the main character had a well-defined personality; one that deviates from most main characters from games of the same genre. It was very nice… for the most part. I would have liked to see Kat’s mental deterioration a little more. When she eventually finds her way to the small room, the complete jump in pacing was very jarring to me. One moment she’s creeped out, but the next she’s having a complete meltdown. I think this would be easily remedied if she was shown to react a little more to what is going on, or at least show something traumatic that shows her that she is actually in danger. The other characters weren't as fleshed out, though I think they were mainly used as a means of shock towards the end, which is understandable.
The atmosphere and overall tone were handled very well... again, for the most part. It starts with something somewhat whimsical before being brought back to reality and establishing a somewhat neutral, yet eerie, tone. Towards the end, though (and this goes along with the character summary), I think having a little more disturbing, or unsettling, imagery or events happen BEFORE the scene in the small room would make the end of the demo feel much more natural.
I would typically put something in here about the puzzles, but puzzles in the beginning of any RPG-Maker-style game aren’t much to write home about. Though, I was happy with their inclusion nonetheless.
Overall, I thought the characters and the story were well written and the atmosphere was handled with care. I can't wait to see where the story goes next. Will certainly be looking out for either another chapter, or the full release.
Hope development goes well~