Hihi!
Your build is great - there's good detail and texture throughout it. I'd suggest adding that little more detail on the inside, adding things such as some more décor vines/leaves and rooms to make it even more aesthetically pleasing.
The parkour fits the difficulty of a medium map but is too long. The parkour does have some variation ; however, the variation is in clumps which makes it repetitive. You can add some more variation such as plant pots, heads and glass panes to make to parkour more enjoyable. Also, don't hesitate to add a few more ice/water jumps as there's only one or two of those! Quite a bit of your map isn't used so you could make it a hard/expert map so that more of the map is explored ^-^
I hope this helps c;