Hi there Rqzori,
Im sorry to tell you your map is being rejected.
The THEME is unoriginal as we already have maps based on the theme space.
The BUILD is all floating islands and parkour, which is not allowed. The build does lack detail and texture. Try to have a main island alongside a main build so that you can add detail easily and your parkour can have a pathway that flows well.
The PARKOUR does fit the length of an easy map and difficulty of an medium map. The length of your map will need to be increased to be a medium. Your parkour is lacking variance, the only things that are incorporated are regular jumps, ladders and panes. To add more variance, try adding more jumps with unique blocks like pots, water, heads, vines, etc.
Thank you for your submission, hope to see more from you ! Have a wonderful day.[Hayley]
-Ana