Hello k_kossa,
Unfortunately, I will be
Rejecting your map.
The theme isn't original, as there are many maps that are biome related, as well as a couple of ice biome themed maps. Please refer to the document in this thread -
https://manacube.com/threads/parkour-list-with-theme.20194/ to make sure your map idea is original.
The build is nice, it is quite small and simple, but it has nice detail.
The parkour is quite repetitive. You did use a few different types of blocks, however you did group your jumps a lot. What I mean by this, is that you would have a sequence of just normal blocks, then just fences etc. Try to mix up your jumps a bit more throughout your map, as well as experimenting with a larger variety of blocks and items, to create more original and enjoyable jumps.
A lot of the parkour is floating. Since your build is quite small, most of the jumps are floating around the build and void. In the future, try to implement the jumps into the build more, as having an excessive number of floating jumps can make your map look a bit messy.
The length and difficulty are good for a medium map.
Thanks for submitting your map! I hope to see more maps from you in the future.