I was a bit confused at first in the cave, until I went back and found the bag, but managed to get through it till the zombie level. I failed three times in a row with a little under 30 seconds on the clock at each but it was quite fun. It did feel like the range of the gun was a bit short and I often found myself shooting at things that were out of range.
Now that the slightly negative is out of the way I wanted to say scene 2 inside the house looked absolutely stunning. The room was well put together and I was really impressed with how perfect it was.
Really good work on putting the game together, i'll try it again once I sleep to see what comes after the zombie level, it may take a while as i'm terrible at FPS games.