Tidy little game you have here.
The tunnel-vision effect is a bit weird but the general design is very nice.
A few things look like they belong in a different game however, such as the low-poly key-pads on the doors. Perhaps a change of textures can fix it as a box on the wall does not need a lot of polys.
I suggest you may want to decide, are they key press code pads, or swipe-card locks ? Opening a key-based unit with a card does not make sense.
The tunnel-vision is I guess supposed to be you holding a torch ?
A torch that apparently you sleep with and have on at all times taped to your head or chest.
I suggest you have the torch be the first thing to pick up.
If you move the torch to one side slightly, the player should see a less flat view as they will see the shadows on objects shift sideways (this is the same rule for using flash on a camera).
Nobody holds a torch central to their body anyway so this should be tweaked anyway.
I am in 2 minds about the burning-ball. It feels like you are being chased by an evil incense holder from a satanic church.
Not sure if it is because it is so ball-like or because it looks solid.
Have you tried it more transparent or with a less obvious edge ?
A shifting blob of smoke is perhaps the effect you are looking for, as it is a common reference in paranormal cases.
However it did occur to me that maybe something like the flying balls in the Phantasm films would also work ? Mostly just a simple silver ball. Technological looking, but possessed by evil with the ability to summon whatever blades or drills it needs to tear you apart.