Review
Theme
Not the best.
There is already some "Magic" theme (And there is also a lot of parkour with "Floating Island" in it) and the theme itself is not the most original. Be careful next time !
Build
Quite good.
The build looks good in global, I just don't really like the bottom of the big floating island, looks a bit messy because blocks are place a bit randomly.
Parkour
Can be better.
There is any variation of block in your parkour, try to had some ice, slime, ladder, fence.. even if it's a easy parkour.
Speaking of easy parkour, the balance between the difficulty and the amount of jump is good; but maybe try to buffed a bit your parkour because it's a bit too easy.
My opinion
Can be accepted, the build looks good but you need to do some improvement in your parkour.
Also I'm not a map judger, so their opinion can be different !