Good start... a bit flawed execution
I am still waiting in dire for a really good ghost game. A game that doesn't have to use action sequences to be challenging and without a great green monster for a last boss. Unfortunatly, there hasn't been anyone lately. This is a good start for such a movie, but it still (except for the brilliant atmosphere) lacks the main ingredients for a good game.
Those ingredients... in my honest opinion is...
Good Story... This was standard ghost story stuff, a man going insane from evil spirits, eventually killing himself... nothing we haven't heard or seen for quite some time
Atmosphere... you did a great job here, with the dark corners and eerie music, and ghosts showing up now and then.
Challenging and engaging puzzles... there was one safe-puzzle, and one key-puzzle... again, nothing we've never seen or done two thousand times before.
There's also a couple more things i like to point out. First of all, there's very little in this building to actually point out that it is a factory... You can combine this with perhaps a factory puzzle... getting wheels on a machine going or something...
There's also quite little buildup, you get what you expect, a game that starts with a bang, and ends with a fuzz. It's scary in the start, but after the ghosts have popped up, there's not really anything more. Granted, at the end a strange thing shows up and kills you, and if that wasn't the end, i don't know how to get through it anyway.
If someone were to make an excellent spooky-game, it would start slow, perhaps someone would even say it would be boring, and slowly, but creepily build up the tension.... perhaps with an occasional "did i just see something" movement or changes in the scene, without any sound, then moving towards a completely mind-boogingly good ending, however that would be...
I think you absolutely have the potential, so keep working, i'm sure you'll get there
this rates 7 out of ten... mostly because of the graphics and the atmosphere... the poor interactivity and few game-elements pulls it down a bit.