* fast forward to the Sea Zone being replaced by the Annoyance Zone *
Seriously, though, there's limitations :-/
I'd scrap it since Serenity doesn't visit the Sea Zone in canon, but it's there for Ignis characterization, or so Kim says.
Umbrageous Light's Sea Zone spans multiple maps, rather than just one map, but then, we're stuck with ~100 maps.
It'd be easier to remake LS in Game Maker (just not GM4), frankly.