The player is tasked with exploring the pages of a magical encyclopedia known as the Aquaticus, which has been infected by a dark substance called the Influence.

The player must acquire Rainbow Drops, usually done by surmounting obstacles and completing environmental puzzles, in order to purge the book of the Influence.

The pool of water gains the ability to transform into two other states (a block of ice and a cloud of vapor) as the game progresses.

During the convention, Curve Studios met with Masa Miyazaki and Azusa Tajima, two producers from Nintendo, who signed a publishing agreement following a pitch of the game idea.

Biddle described that the Wii Remote was a natural fit for Fluidity, although he did explain that there had been difficulties in fine-tuning the responsiveness of the controls, particularly the jumping mechanism.