Create an image of a whimsical cat riding a flying bicycle through a rainbow-colored sky, with fluffy clouds in the background shaped like various modes of transportation.

Envision a playful and amusing feline gently cycling in mid-air on a fantastical flying bicycle. This peculiar scene takes place in a sky radiant with all the colours of the rainbow. The background is dotted with fluffy, shape-shifting clouds, humorously molded into forms reminiscent of different types of transportation - from ancient sailboats to steam locomotives and modern cars.