After watching a few gameplay videos, I fixed some bugs and tried to improve the situation a bit.

• You can reload all weapons, also the shotgun (beware clip-based weapons waste the current load)
• Added an in-between level to teach handgun usage.
• Adjusted the walk cycle (just for my own pleasure)
• Relaxed the hammer level as most of the testers stuck there
• Improved slightly the NPCs
• Added experimental game music which I got from a friend of mine.