Leviathan Warships is a turn-based naval strategy game. Your job is to guide a series of ships through watery battlegrounds, leading them turn by turn against your opponents. The game is similar to Bungie's Crimson: Steam Pirates, in that you guide ships around by dragging them, but it's much more complicated.
You can aim each ship's guns separately, upgrade your ships as you see fit, and take on co-op and multiplayer battles in addition to the main campaign. The whole package is impressively thorough, and in that sense, the trailer is dead on.
In fact, there might be a little bit too much here to play with. Those looking for a casual title will find Leviathan Warships overwhelming. But the $4.99 price is fitting -- enough to signify the game is substantial, but still cheap enough for anyone interested to jump right in. Leviathan Warships is highly recommended for sure.