Hello SpoopyBirb,
I regret to inform you that your map is being rejected.
The theme is unoriginal, because as mentioned above, we have several maps relating to the nether (DeathMountain, TheNether, Magma.)
The build is decent, although it does appear to be a little bit plain. I would give the ground a more defined shape, not just flat.
The parkour is a bit repetitive with the same jumps being used; I recommend adding different kinds of jumps throughout your whole map; you can look at recently accepted maps to see some examples of these! The parkour is also mostly floating (meaning it isn't attached to the build) which can make it look unattractive. It did fit the difficulty, though, so good job on that!
Thank you for submitting your map, I would love to see more submissions from you!
Have a nice day,
Kristina