Sorry to tell you that your map have been rejected,
The theme is not that original, yeah there is no "Cove" maps, but there is still some maps who looks similar to your map, like Lagoon (Donator) for example, the build is not really good, I found the inside part not really attractive, the wall looks pretty random (Like some wall outside), and the map feel empty in some part, more decoration (But with less //brush builds) would be good. The parkour is decent, it's varied and fun, my main problem here is the amount of invisible blocks, I don't think they are all really important (Like this wall http://prntscr.com/ml4a0s), please avoid using too many invisible blocks, it only makes the map more confusing and annoying. I also found a little exploit right here : http://prntscr.com/ml47o9
Thanks for submitting your map, would be really good to see more maps from you !