Create a simple 2D cartoon of a cat playing with a mouse. The cat should have a playful, happy expression, with wide eyes and a cheerful smile. The mouse should also look playful, with a tiny, mischievous grin. Both characters should be in a lighthearted interaction, such as the cat playfully pawing at the mouse while the mouse teasingly runs around. The background can be a simple, indoor setting with minimal details like a rug or a piece of furniture, creating a fun and cute scene.