Hoi YhonnyMP,
Sorry to tell you that your map have been rejected.
The theme is not original, because there is already a lot of "Biomes" themed maps, be careful next time ! The build could be better, the islands looks good, but my problem is the little amount of flating jumps around your builds which make the build messy and less attractive, please try to build more your parkour on/in the build and not around like you did. The parkour is not really good, it's a bit varied some times, but it's still pretty repetitive sometimes, like bellow the sand island, which have only normal jumps, try to vary the blocks for your parkour through the map.
Thanks for submitting your map, would be really good to see more maps from you !