I regret to inform you that your map is being rejected.
The theme is unoriginal, as we already have a map featuring different ores (2DMC) as well as maps based off of Minecraft blocks. Before creating a map, please make sure that the theme has not already been done before by going here and clicking the google doc in the thread: https://manacube.com/threads/parkour-list-with-theme.20194/
The build is quite plain, but this is also due to the theme, so try to base your map off of something that you can add several details to.
The parkour is varied a bit, but gets repetitive within each section, so make sure you use different types of blocks throughout your entire map. The parkour is also floating quite a bit on the outside (meaning it isn't attached to the main build) which makes it look messy. The length of the course/difficulty of the jumps are good for the easy difficulty.
Thank you for submitting this map, I would love to see more submissions from you!