Looks remarkable, especially for a first map, but I think the map is too geometrically complex for its size; slowdown should always be avoided whenever possible, and some of the details could be pared away for performance. (The best place for this is that candy-cane step in the big side room, which I think is pretty ugly anyway.) Still, the minute details in some places are really appreciated.

The layout itself is fine, but I think it tends too much toward hallways rather than rooms, which leads to an excess of suicides when there are as many rockets as there are on this map.

A word of caution for the future: more polygons do not make a map better. It's better to have a visually simple map that plays well than all the bells and whistles but either doesn't run smoothly or has various flow issues. In this case, slowdown is a problem.

The map itself certainly shows competence and a keen eye for details, and it'll just take practice to hash out the smaller stuff. I'd give this a 4.5 but I'll give you the benefit of the doubt. (Plus you can't do half points anyway.)