I think it has an interesting idea, but it needs more work.
Here are my notes:
- It is very confusing that when the game starts you get a lot of bullet hits, yet you don't die, except when you go down the stairs and suddenly you die by a bullet. So it's not clear why suddenly bullets kill you.
- The view movement feels very heavy, which does not help for a fast first-person shooter. Also, walking is slow and makes you an easy target, even with the panic mechanic, since you can't move your view fast, the enemies at your back get you.
-I liked the idea of the panic mechanic. However, implementation needs tweaking. It is difficult to understand how much panic you have, and it immediately hits you making the shoots difficult, which is also enhanced by the lack of a crosshair. Since you are getting shoots all the time, I guess it is always high. Maybe it needs something like being accumulative: if enough bullets go near you, you get the shakes, and you need to hide or something; also killing a target could lower that panic level.
- In this type of game, you will die a lot. So it is very tiresome to have to reload the whole page to start again (which also shows me the Unity loading process). In Unity, loading a scene is fast to implement and adds a lot to quality.
With more work, something interesting could come out of this idea. There is a lot of shooters but I don't remember a mechanic like this one, which is more or less similar to the Insanity levels in Amnesia the Dark Descent. It could be a very interesting mechanic if getting it right. Best of luck!