Hello Clessidra,
I am sorry to inform you that this course is being rejected. The build on the outside isn't very attractive since it's just spheres. The theme also isn't very original, since biomes are a repeated theme. However, I do like the inside of the spheres. The parkour could be less repetitive and have a little more variation in blocks and jumps throughout.
Thank you for submitting this course! :D
If you have any questions, feel free to DM me on here, in game, or on discord! :D
-Ashley (ThePKFish, fishy1980)