Some remarks:
- The main camera is close to the character (it is worth shifting by 100-200 units)
- Probably it was a mistake to make a first-person camera attached to the skeleton of a character (it's difficult to navigate, aim, etc.)
- It's almost impossible to aim for correct shooting
- Perhaps it is worth prohibiting movement when switching to the camera from the first person
- Medkit does not restore health (Condition - is it health?)
In general, it could be an interesting survival-horror, but definitely not metroidvania.