If this is a map, it could mean a problem with the lighting, texturing, geometry, or layout; try the Cube Wiki for tips on using the engine. Should it be some other form of content, then it may need to be elaborated upon to be worth something.
Not my first map, but my first submission to Quadropolis.
This is a remake of the classic starting map from the first Doom, released 17 years ago. Differences between this version and the Doom version (apart from the choice of engine) are a larger monster count (89), a large outdoor area (with about half the monsters) and a slightly different layout (don't worry, it still looks nothing like a hangar).