This is could be a really great game; the only problem is how little money you get for replaying levels. Unlike what some people say, it is very possible to beat the boss ships by upgrading your speed above everything else, but only if you win enough to be able to afford it. Once you encounter a level you cant beat, you either pay a crap-ton of money on in app purchases or grind for for days or weeks on what little they give you.
Glarson9899 about World Of Navy Ships, v1.0.0