Let me start out by saying that what this game does, it does well. It's well-thought out, with puzzles whose difficulty is appropriately labeled. Furthermore, there are enough puzzles at each difficulty level that, by the time you've completed one set of puzzles at a given level, you've trained yourself to the next level.
But there's definitely room for improvement. The most glaring problem is the fact that, at least as far as I can tell, there are no battleships that span four grid spaces. Furthermore, it would've been nice to have been given a simple explanation of the controls without going through an entire tutorial. Both of these items are fixable in the execution of the game. In the end, I feel that the developers of this game would be well-served to take a look at the gameplay of any of the eight logic puzzle games created by Conceptis, Ltd., for what should be relatively minor improvements to the app, which would make a major impact on its quality.