Minor spoilers ahead, in case you consider the content of a parkout map as a spoiler.
I played through the map now. It was an enjoyable experience. I like it when parkour challenges have the feeling of being part of a real functioning world rather than some random floating blocks in the air. There was plenty of creativity in here and I can appreciate how every section of the map throws something a little different at me. I especially enjoyed the part with the invisible plattforms, the spooky dark maze, the sandstone town, and that part where you are jumping around trees with wooden blocks and stairs around them. Also the ability to complete a section in multiple ways is nice.

However I do have some negative criticism too:
Despite its creativity, I frequently encountered a very similar challenge: Jump from one one-block plattform to the next one-block plattform. Either give every challenge of that type a bigger twist, or replace them with something different that feels less out of place for the world structure (for your next map of course. I don't expect you to change this one).
A big gripe I have is at the end with the Elytra. Just give me 64 rockets every time I enter the volcano again. An Elytra without rockets is neat, but you can only use it once and then you either have to commit suicide, or stop playing. Don't be afraid to go all out with the reward for finishing the game.
During some parts of the game, I felt like the developers didn't respect me as a player due to all the arrows and carpets that were placed everywhere. I am not stupid, I can figure it out by myself. I don't need you to show me the direction as if I was a little kid. In fact, a big part of the fun for me is figuring out where to go. Now I am not saying that you should make it impossibly hard or frustrating, but at your attempt of fixing players getting lost, you overdid it and instead ripped player agency from the map. I agree with that other comment guy who said that they should be optional. In general, I assume that people who come here to this website are already experienced enough in Minecraft that they can find the way themselves. Even without arrows, it's usually pretty straightforward.
The only time I remember looking for a way was at the very beginning where you played a ladder behind a tree stump above the water. The sign hinting for it was useful for me there (though I could have done without it too).

No negative criticism now, but my personal preference: While the island you made felt great as a big huge interconnected structure that you have to climb, I didn't quite enjoy all the different bioms that were sectioned off by fences. Now, I didn't mind the bioms themselves, you did a great artistic job there, but I didn't like how frequently they changed and how seperated the fences made them feel. It's like a lot of mini-levels, where one doesn't really have anything to do with the other.

What I would like a lot more would be a few really big bioms, maybe seperated by mountains and caves or (fake) nether and end portals. So you would start in one biom, fight your way through it, walk through a somewhat lengthy cave with plenty of interesting stuff in it, and then come out on the other side to see an entirely different biom, like going from a jungle world to an ice world. What would be even better is if you eventually come back to a biom you were already in before, but on a different level (like the top of the biom, while before you parkour'd through the bottom). You could built in shortcuts with pistons and levers that can only be activated from further ahead, that allow the player to get quickly back up if they were to fall down to a previous, old section.
Personally, I think the best parkour maps are those that aren't too hard and look completely natural - as if you are parkouring through the biom and not some out of place challenge.
But as I said, that's just my personal opinion.

I give your map an 8/10. It's pretty neat, but not as good as the tower v.2.0, and not as good as my idealized version of a parkour. Keep it up.

Minor spoilers ahead, in case you consider the content of a parkout map as a spoiler.
I played through the map now. It was an enjoyable experience. I like it when parkour challenges have the feeling of being part of a real functioning world rather than some random floating blocks in the air. There was plenty of creativity in here and I can appreciate how every section of the map throws something a little different at me. I especially enjoyed the part with the invisible plattforms, the spooky dark maze, the sandstone town, and that part where you are jumping around trees with wooden blocks and stairs around them. Also the ability to complete a section in multiple ways is nice.

However I do have some negative criticism too:
Despite its creativity, I frequently encountered a very similar challenge: Jump from one one-block plattform to the next one-block plattform. Either give every challenge of that type a bigger twist, or replace them with something different that feels less out of place for the world structure (for your next map of course. I don't expect you to change this one).
A big gripe I have is at the end with the Elytra. Just give me 64 rockets every time I enter the volcano again. An Elytra without rockets is neat, but you can only use it once and then you either have to commit suicide, or stop playing. Don't be afraid to go all out with the reward for finishing the game.
During some parts of the game, I felt like the developers didn't respect me as a player due to all the arrows and carpets that were placed everywhere. I am not stupid, I can figure it out by myself. I don't need you to show me the direction as if I was a little kid. In fact, a big part of the fun for me is figuring out where to go. Now I am not saying that you should make it impossibly hard or frustrating, but at your attempt of fixing players getting lost, you overdid it and instead ripped player agency from the map. I agree with that other comment guy who said that they should be optional. In general, I assume that people who come here to this website are already experienced enough in Minecraft that they can find the way themselves. Even without arrows, it's usually pretty straightforward.
The only time I remember looking for a way was at the very beginning where you played a ladder behind a tree stump above the water. The sign hinting for it was useful for me there (though I could have done without it too).

No negative criticism now, but my personal preference: While the island you made felt great as a big huge interconnected structure that you have to climb, I didn't quite enjoy all the different bioms that were sectioned off by fences. Now, I didn't mind the bioms themselves, you did a great artistic job there, but I didn't like how frequently they changed and how seperated the fences made them feel. It's like a lot of mini-levels, where one doesn't really have anything to do with the other.

What I would like a lot more would be a few really big bioms, maybe seperated by mountains and caves or (fake) nether and end portals. So you would start in one biom, fight your way through it, walk through a somewhat lengthy cave with plenty of interesting stuff in it, and then come out on the other side to see an entirely different biom, like going from a jungle world to an ice world. What would be even better is if you eventually come back to a biom you were already in before, but on a different level (like the top of the biom, while before you parkour'd through the bottom). You could built in shortcuts with pistons and levers that can only be activated from further ahead, that allow the player to get quickly back up if they were to fall down to a previous, old section.
Personally, I think the best parkour maps are those that aren't too hard and look completely natural - as if you are parkouring through the biom and not some out of place challenge.
But as I said, that's just my personal opinion.

I give your map an 8/10. It's pretty neat, but not as good as the tower v.2.0, and not as good as my idealized version of a parkour. Keep it up.

Mathical Funfacts about this Map:
The radius of the map is r=136, therefor the diameter is d=272.
The circumference is U=~855, and the surface is r=136, A=~58107.
(All data are in Blocks)

started playing this for my channel, just got past those sandstone ruins. Great map so far from a guy who dosen,t like Minecraft parkour

Why do I only fly above the start Island, looking down, when I use a dedicated minecraft server?