Hello,
Unfortunately, your map is being rejected.
I am unsure what this theme is. Ensure you have a specific theme to your map.
Your map lacks detail and depth. Try adding some more detail, texture and depths within your builds.
The parkour itself fits the difficulty for the most part, so good job on that! The parkour is very repetitive and lacks variation. Use variation such as heads, cocoa beans, ladders, vines, water, slimes, trapdoors, piston heads, glass panes, etc to allow you to space it out.
We hope to see more maps from you in the future.
Have a wonderful day/night
-Hayley