Ohohoho, the first thing I notice about this hack is the cool tiles and fitting palettes. Rhevarhe_duh sure can make some cool tiles, I say. He's one of the new rising tilers, If I do say so myself. Ahem, enough on that subject. On to the review.
Mapping. Mapping is an ideal and needed skill in ROM Hacking, and this guy has it down. Yes, that's right, the maps in Turquoise look great. I have to admit, the first few maps were...err...not very polished, and really lacking. Tropical Sunlight apparently noticed this problem, because the maps as of late are pretty slick. The cave mapping really impresses me, it looks great as well as having plenty of walking room. On top of that, the caves look really natural, which is what most mappers aim for. Just the opposite of the cave mapping is the graveyard map. It is really symmetrical, which is a no-no. This is probably something he will have to compromise for the natural look, I mean, go to a graveyard, all the tombstones are symmetrically placed, like in this map.
There are some issues with the current maps, however, such as playability. The playability factor is sub-par on a few maps. There is one or two tiles to travel on, which is notsogood(I'm guilty of this also, but lets not get into that). As I said abouve, the tiles and palettes are pretty nice as well. That is, however, besides the grass path palette. A good rule of thumb with path palettes is to never make the border colour lighter than the inner contents. I really like the addition of Ruby/Emerald tiles, they mix well with rhevarhe_duh's tiles.
As far as scripting goes, Tropical Sunlight hasn't really shown anything except for a couple of beginning scripts, so there's nothing to really talk about on that subject.
I really like all the special additions Tropical Sunlight has implemented/plans to implement. Samson's wonderful Fakemon will make a great addition to the hack, as long as they are inserted properly, which Insecreep has been. It seems he plans to add a new item called "Pikachew". The Pikachew is a key item, so I'm assuming it deal with a quest of some sort or something along those lines.
There's nothing really left to talk about, so I'll just sum up the review now. Overall this hack has potential, and it looks great, but who knows where it will be in the future. I'll be keeping an eye on this hack, just to see what becomes of it.