One thing to mention is that I love Gorillaz!!
Just by looking at this screenshot. The build itself is amazing, good terraforming skills used to create the overhanging land at the top and good spacing of detail throughout the build! Great work on this man. One thing I will say is you could've made the bottom island section a little wider, allowing for more trees and detail to be added; however, this is just my critique of the build! I also love the use of the higher layers of water, really adds to the detail in the ocean!
(The pirate ship would've been a lovely addition!)
The parkour is very varied and balanced throughout, with a few tough jumps but the rest of the parkour evens it out so personally, it fits the difficulty through and through.
Other than that, I've not anything left to say about the map, honestly good work with it!
Please keep in mind, that I am not a map judge and that I am just giving my overall opinion on the map <3