At first the game description got my hopes up like "oh yeah something for the brain" and in the end it was so obvious who proxy was that i was almost dissatisfied (especially because i suck at this kind of game but maybe i've just gotten better dunno) but in the end it doesnt matter, not every game needs to be teethgrinding hard right? So now its analysis time!
Graphics: well normal RPG Maker style not too detailed and the charakters had 2 different stances.
I dont know to much about the RPG Maker so i dont know if you made the Charakters with it or not + animations etc (yes i do know that you used unity just in case i doesnt look that way) but i guess its safe to assume that you made the "dead people" yourself sooo only thing that was kinda weird was the cabel around the neck of the first victim because he to far to the right, it looks like hangs besides the cabel but im not an artist so what do i know. xD
Story: Well there is not much to say about the story, its a short story and i am kinda interested in that proxy guy/girl/thing (if there is more to him/her/it then this game shows i realy would like you to send me the data :D) but i guess its possible that he/she/it is there to give the game more freedome and more possibilities (especially if you want the game to fit in an elevator i guess).
And of course this is a storydriven game (but you made the game so you know this already) so the scenery is important aswell and you supported it with some good picked music, realy great.
That you(?) lost an arm in the beginning was a bit much to be honest, when you think about the blood loss he wouldnt survive that, but it's a small game so that is just a minor detail.
Gameplay: Well this would be the part where i could excel (because i study this stuff) but well it is a story driven game in the end.
What you did was giving the player exactly one click of gameplay (a meaningful decision so to speak) and that was to kill someone. It works but that little part could have been better it almost seems like you rushed it, maybe you just wanted to get done with the game or your programming skills didnt let you do more at the time etc whatever it was here are some suggestions.
Suggestions: The cursor change was a good thing but locking on the heads of the people is where it got wrong(ish), imagine how it would be if you tell the player to shot the girl, the only survivor besides you, because it seems to be the only way to "win" the player would be forced to think it through because that couldnt be possibly right + you moved proxy in the end so there already was a hint, and the possibility to shoot yourself would make sense to + the last hostage besides you already told you that you could be proxy without realising it.
Well that is enough for now i guess i gotta write on my own work again, maybe next time i look you up there is something with more gameplay for me to look at^^ anyway gonna look forward to your next project.