Pros and cons are down below) Check out my vid here (the game is the 3d there, likes and subs are highly appreciated!)):
Advantages:
The ambiance of the game was pretty interesting. The scares were nicely paced and the sound design was well done! The mannequins is a pretty scary topic - it definitely added to creep factor, nice job! Moreover, it's cool that the game has several endings, though, I haven't found the secret one :( Still, it's interesting, adds a lot to replayability and makes the whole adventure much more interesting. I think that's a great way to intrigue the player)
Disadvantages:
Well, I think that though mannequins are scary themselves, it disappoints when one notices that they don't actually persue or pose any actual danger to the player. Also, I think the game lacks lore. What were the player doing there? Why didin't they have any weapon if they went investigating abandoned buildings alone? I hope that the secret ending reveals a bit more of the story) Still, I think there is room for improvement)
Overall:
I rate this experience 4/5 stars as the game could be improved a bit more. Still, it's pretty impressive how you made from a 9 minute experience a 20 minute adventure of looking for collectibles to unlock the secret ending (I guess that's how one can do that). Great job!
Hope my feedback was useful!