The zombie is awseome 
Plus, I really like that you have a crowbar - it pleasantly feeds Half-Life-emotions but it still has his own kind of character, so that it does not seem to be copied too much! Keep going!
However, I agree with Chiaro22 - you can still add a lot of detail on your scenes! Can you state where you see yourself in that regard? Are these scenes only rough blockouts or do you aim to have levels with a lower level of detail?