Hello <3,
It hurts me to do this, but I have to give you a -1, and it's 90% due to the fact that the theme is unoriginal. There are several floating island maps already, and also there are several ice/snow/winter maps already. The build is amazing, and it certainly does seem like you put a lot of effort into it. For the parkour: The jumps aren't really varied enough, and I would recommend you add some more indicators so people know where to go (i.e the slime jump)
I wish you the best of luck! <3