This game came out today on Wiiware. I had been keeping my eye on it pre-release because the premise was interesting (an underwater exploration game) and the fact that it used NyxQuest's engine (though it's a different developer).
The first thing you notice is that this game is pretty. Oh boy, is it ever pretty. NyxQuest had some kick-ass lighting, but it seriously lacked colors and detail, and the environments weren't very animated. Well, the awesome lighting is back, in a game way more colorful, detailed, and teeming with life. It's really quite a sight.
The controls are extremely simple, but they word: you only use the Wiimote's pointer. Hold B to swim, press A to shoot your dart gun, and that's it. It takes no time at all to get used to and swim around like a pro.
I've heard the word "metroidvania" thrown around to describe this game, and while it's true that it's very much about exploration, you don't exactly find yourself having to find the super missiles to open the green door, here. Instead, what you're looking for is treasure, which gives you funds to upgrade your equipment: swim faster, dive deeper, get a bigger airtank, etc. Other than your suit which determines how deep you can go, there isn't an instance where you need a specific item to get somewhere.
So far I'm really enjoying it. I played for 2 hours in one go without even realizing it. I'm really wondering how long it is, since I don't even have even half of the "main treasures" (one per level). This could end up being quite a meaty Wiiware game, longer than NyxQuest or LostWinds by a long shot.