I also found a few bugs:
- If you use the shield (press right) and hold and press W, the player kinda slides forward.

- Sometimes, when you talk to GON the camera is placed behind a wall of, for example, barrels.

- After loosing, you can still press ESC to look at the inventory. You know, on the Credits screen.

- In some places, you can just out of the level.

- There is one place, where a lamp blocks your way down a staircase. Not completly, but I got stuck twice.

I also think the Camera is too shaky.
Good things:
Great gafiks!
Great Design!
Great Menu!
Great Inventory!

Keep up the Work
Been looking forward to the Demo erver since I saw your first try (with the Virus). But since I have a Laptop with a mobility radeon 9000. There are some grafik mistakes, but that's not your fault.