Hello wouter78,
I regret to inform you that your map is being rejected. The theme is unoriginal, as we have several maps relating to grass and other biomes. There is no main build, which is crucial; try to have a main build next time, something that the parkour can build off of. The parkour is very repetitive, with the use of grass blocks. The parkour also does not fit the difficulty as the jumps aren't hard but the map is quite lengthy.
Thank you for submitting your map, I would love to see more submissions from you!
Have a nice day,
Kristina