Heya,
I regret to inform you that your map has been REJECTED.
The theme is unoriginal as we already have the winter wonderland adventure map and many other wintery maps.
The build is lacking detail and depth- try to add more detail to your builds. Build a main island/build so you can path your parkour around it to make look less messy.
I'm not quite sure on the difficulty you were going for as you need an end pressure plate/wool at the end of the map. The parkour does fit the length and difficulty of an easy map for the most part though. There is some variance so good job on that! To add more parkour variance, use blocks such as water, heads, fences, trapdoors, cocoa beans, daylight sensors etc to make the parkour feel less repetitive.
We hope to see more maps from the future!
Have a good day/night
-Hayley