There are two different worlds: the real one and the cat's world: The real world is built with the soft, detailed, traditional illustration, while the cat's world is simple (like the character's mind), abstract and saturated
In the cat's world, the thread loses its color from pink to gray because pink color is a 'blind spot' for cats' eyes, and the neon pink outline of the thread is the connection with the real world (which is supposed to be visible only for audience)
Camera movements. The camera in the real world is still, spacious and creates the effect of a good, lazy day (like the cat usually spends it); meanwhile, in the cat's world (because it's dangerous, scary and exciting) the camera is moving, everything is dynamic and intense
There are only 3 characters (cat, ball of thread and cat's owner - a woman), which is great because it's easier to get acquainted with them for animators
Animation itself. It's a traditional, frame by frame animation. There is a complicated animation of the thread in the cat's world which is gonna be elaborated and completed from scratch by me
The beginning and the end of the movie are happening in the real world and some camera positions are repeated, so it makes a good composition and an effect of the loop
This movie is quite short 3-3,5' and needs only music and some sound effects