Tomb of Thunder - The Shores of Non-Existence

This is map 1 out of 7 of Tomb of Thunder, named The Shores of Non-Existence.
This one was made last, as I wanted to follow John Romero's advice of making first levels last, as the accumulated level design skills would manifest here and make a better first impression.
The Island of the Dead inspiration was put in just as I started making this level, I thought such a reference would be on point for the start of this macabre journey.
This took a month and a half to complete.