This game is a lot like Sid Meier's Pirates! on computer, and manages to compare on my new iPhone 4 which is a feat in itself. However, there are a few major things missing before my friends and me will purchase the whole game:
1. MULTIPLAYER--this game is begging for it, and I'm almost overwhelmed it doesn't already have it since it's such an explicitly fundamental component of this type of game.
2. MAPS--there needs to be less boundaries, and land-based port cities to sail into. Get creative! Land can be a boundary instead of out-of-context buoys! And with port cities you could do things like upgrade ship, attack the city, defend it, etc. Lots of room for development.
3. MULTIPLAYER--yes it's that important, literally the deal breaker. Bluetooth, wi-fi you name it. This would be among the very top apps with good real-time multiplayer like in Archetype.
I know these things are possible, so take the opportunity and make these updates! This game exudes promise! If it possessed aforesaid features I would honestly spend $5-10 on the game, and the app. would become a must-have for just about everyone.