Hello bassguitarr,
Unfortunately, I will be
Rejecting your map.
The theme isn't original, as there are many maps related to minecraft mobs, as well as a creeper map already. Please read over the document in this thread -
https://manacube.com/threads/parkour-list-with-theme.20194/ to make sure your map idea is original.
The build isn't great, it is accurate to the theme, but it is quite simple and blocky, I do understand though that due to the nature of the theme it is inevitable that the build will be blocky and simple.
The parkour is quite repetitive, as most of the jumps consist of normal blocks and ladders. Try to experiment with a larger variety of blocks and items when building jumps, this will make your map overall more enjoyable to complete.
The parkour is a bit floaty, but it is incorporated into the build for the most part, so this isn't a huge issue.
The difficulty is good for an easy map, but the difficulty is more suited to a hard map. Please refer to this thread -
https://manacube.com/threads/must-read-map-submission-information-format.649/ to make sure your map fits within the requirements.
Thanks for submitting your map! I hope to see more maps from you in the future.