Hello Sherman8r! Im here to give you my personal opinion on your map! Please note that I am only a mapper and my opinion has no effect on the final decision at all!
1-Build || The build was okay I mean it looks cool but I think you should have put it the other way. The way it is looks like an odd egg. But if you wanted to go all the way around and see what it is you definitely could. I also found the build to be a bit small. There is nothing wrong with that but when it is small, it seems a bit crowded.
2-Originality || As I know of, there are no maps with the theme of "maw” so good job with that!
3-Parkour || I thought the parkour was a bit boring as you only used slabs, fences, iron bars, and ladders. I think next time, you should add heads, vines, pots, anvils, cakes etc. Other than that, I think the number of jumps it a tad bit low but I think its okay.
All in all, good job making this map. This was not meant to offend you in any way! Just a heads up!