Rockitty is a green cat with a single gold eye in the middle of its face. It wears a pink space helmet, which has a glowing pink antennae on top of it. Underneath this helmet is a red collar with a small bell in the shape of a tilted square. It has a white skull on its belly and small legs.
Rockitty possesses a machine that allows it to fly into space. If a object comes in contact with Rockitty it will rebound of the object or, if the object is hazardous, rebound back spinning. Rockitty will stick to pink goo, activate switches, and push space cows and small planets.
In the game, Rockitty is in search for fish. It uses its space ship, the kitty cruiser, to navigate space. It has to dodge many obstacles, hazards, and enemies to collect fish and get back to the kitty cruiser. At the end of the game Rockitty has managed to collect enough fish. Feeling stuffed it returns back to Catatopia for a cat nap.
Rockitty could possibly be owned by someone because of its collar.
Rockitty appears to have a skull on its belly, which possibly hints that it is evil, as many Nitrome characters that have skulls somewhere on their sprite tend to always be evil. When zoomed into, it bears a resemblance to Austin Carter's skull shirt.