Hoi Rackals,
Sorry to tell you that your map have been rejected.
The theme is not really original, because there is already some "Sea/Water" themed maps. The build could be better, it's pretty simple and plain, would be good with more decoration, mostly Inside. The parkour is not really good, it's really repetitive, only water jumps, and I found your map way too hard for a medium, even for a hard.
Thanks for submitting your map, would be really good to see more maps from you !