Hoi k_kossa,
Sorry to tell you that your map have been rejected.
The theme is not original, as we already have a lot of Rainbow maps, but your build still seems quite original, I would still tell you to be careful next time ! The build is quite interesting, I like the cloud, but I still think the map looks messy because of the floating parkour, please try building your parkour on/in a main build and not around like you did in some parts. The parkour is not really good, while I like how varied it is, I still think some parts are a bit repetitive, avoid building the same jumps in a row and try changing blocks a maximum of time. I also find some exploits on your map (You can easily climb the cloud), so please be also careful of that, ask people to test your map before submitting it !
Thanks for submitting your map, would be really good to see more maps from you !