nice idea with cargo recollection! Also fun detail with obstacles (rocks). moon and wave overlay was a bit confusing though, maybe there is a way to convey the concept visually a bit more appealing:)
The description sounded super cool but I could not figure out gameplay. Tried to add some boats to the upper right island with no luck. seems off the screen.
Very fun! I like the music like beat when you have a nice combo of castles going. Only critique I would add is: I felt incentives to put my castles far away, deep into the water, to maximize their destruction speed, but I wanted them closer so I could enjoy the nice models.
