Review : Theme
Not really good.
There is already some "Biome" theme (Biome because your parkour is basically a forest at the start and the nether after) and the theme is pretty unoriginal. I pretty like the little "story" on it, even if this idea is already used in some parkour.
Build
Can be better.
The little floating island looks a bit "copy and paste".
There is any "big" build on your parkour, so your parkour is mostly floating block, so try at least to decorate them.
Parkour
Decent.
It's Not great shakes but it's pretty decent in overall.
The variation of block is decent but maybe try to add some slime, ice..
The balance between the number of jump (45 ?) and the difficulty is good and your parkour is not too confusing.
My opinion
Not gonna be accepted for me.
The parkour itself is good but the build need to be improved mostly because the theme is bad.
Also, I'm not a map judger (Txilsy and Shron are), so their opinion can be different !
Thanks for submitting your map! I've come to inform you that this map will be rejected.
Shinxray has pointed out the flaws before me, please read his comment carefully. I highly suggest looking at the threads he provided and the ones I will provide you with at the end of this post. Next time, make sure to submit your course using the correct format, so map judges can easily look at your course and know all the needed information. Don't give up, do enough research and I'm sure you will make stunning maps eventually.
Thanks again for submitting, we'd love to see another map sometime soon, so don't hesitate on making and submitting another one. :)
Also, if you have any questions or concerns, just PM me here on the forums or on Discord.