Hello, GoldenGaming
Being apart of a build team myself, I can see the build being really awesome. However -
- The sand and down below. Maybe touch that up a bit, add some detail and different things. But, don't just add random things, I'm not sure what the sand mountains with water flowing out of them are? But things that you would usually find in a Wild West minecraft build. Don't just build to build and to take up space. Not saying you did do that but you know what I mean? Look around for insperation if you need to, just remember not to copy block for block.
It's about you and your style so go for what you like to see on other builds and parkour maps.
I just think it needs that little more. That extra WOWNESS! Haha, you know what I mean? I'm not sure what it is but like I said, I think it has potential and could be really great. Try new stuff, play around with it. Also, like KiKi said, jumps inside the glass tower would be cool!
I hope this helped in some way, this was just my personal opinion, not facts or saying you need to do this or need to do that for it to be good or accepted, just any helpful advice I can give. It's already really good. Good luck! :D