Most of the map consists of running and gunning through large hallways. After a while, the gameplay does get repetitive, you win about three large fights, and then get a full restock of spikes, shells, and health. However, what really keeps this map interesting, is a steadily satisfying feeling of going up - ascending toward some big finale at the top of the fortress. As almost all of the map is indoors, you don't often get to see how each part of the map relates to the rest, but the corridors and rooms crisscross each other often enough for you to be able to gauge your progress. There are a couple novel sections which switch things up a bit, and the finale is great. With a map this size, the amount of lights, entities and brushes for decoration you can use does become fairly limited. That said, I feel that this map could have been made even better if detail, lighting, and perhaps more unique gameplay situations, were pushed into it. The map as a whole, is fairly coarse, again partially due to its size. That said, there are a lot of really cool secrets, and the gameplay remains tough, leading up to a satisfying and difficult finale.