Theta

An underwater-themed puzzle game.

In the Kaiten Puzzle, spin the "Theta" wheels to move the balls to the wheel of the same color. Spinning the wheels causes other wheels to spin as well. Later levels also feature wheels across both screens and other obstacles like pipes.

In Aquarium Puzzle, you have to purify the water by dragging the balls into the Charge Fields. Matching the balls causes the fields to charge faster, but watch out for the black balls that will disrupt the process.

In My Aquarium & Fish Album, you can view information on various kinds of fish and watch them swim around in a virtual aquarium.