Good effort well done
So here is some feedback to improve on for your next title or next version on this
- Some of the models have inverted normals on them like the key handle so they look inverted.
- The ground texture appears to blur very close to the player, which is possibly a problem with the import settings, its resolution or repeating the pattern
- I dont think the guns are parenting correct as movement effects their position in relation to the hand position. Look at reparenting or where your updating the position to fix this
- The guns dont appear to reload so if you run out of bullets you cannot progress
- Get into the animator in Unity it will help you with visual flourish early on while your leveling up your dev skills. For instance I could see your doors and buttons come alive
Keep the games going you have a good starting block here