Don't get defensive. You asked what people think and they are telling you. Telling you that the level is boring, empty and needs work on the lighting is not flaming.
If you care, work on what you're being told about. If I were you, I would look at what other people are doing, and then you will know why you are getting the responses you are.
You have a good start, but it really does look boring, empty and common. We have all seen the stock media with a little blood thrown in many times. If you want better responses, show us something better.
Happy game making.
Crazy Grandpa