Naija has the gift of the Verse. By singing songs, she can weave this force to change the waters around her. With each song Naija learns comes new abilities. With powerful songs, Naija is able to change form, giving players many options as to how to play the game.
And with Aquaria's intuitive mouse-only control system, it's as easy to make Naija swim gracefully through the waters as it is to have her sing, cast spells, and engage in combat with the numerous dangerous creatures that inhabit Aquaria's waters.