Hoi aj448 and Terd,
Sorry to tell you that your map have been rejected.
The theme is interesting, even if there is already some "Animal" themed maps. The build could be better, I think your build don't fit too much with the theme, only the pixel art and some random heads fits with the Koala theme, your map is mostly a tree, which is not original. After the tree is pretty decent, but there is a little amount of floating jumps which makes your map a bit messy and less attractive. The parkour could be better too, it's a bit varied, but I think it's still maybe a bit repetitive, mostly on the top of the tree (the slab and head part).
Thanks for submitting your map, would be really good to see more maps from you !