The idea isn't that bad, but it gets boring fast. Nice try. Continue working on it and add some features/improvements.
You wrote it's just an alpha, so... 3/5.
Great story, great idea 5/5.
The story was great, nice idea, some puzzles were too easy, but okay.
The ending wasn't that good, but it was okay. All in all, it was a great but very short game.