glreno/oneko — reverse-engineered prompt

Build me a small desktop toy app like the classic Neko cat, where a little animated kitty lives on top of the user’s desktop and follows the mouse pointer around the screen.

It should feel lightweight and playful, not like a full productivity app. The cat should use simple old school sprite images, switch animations based on movement, walk or run toward the cursor, and stop or idle when it catches up. Make it work as a Java desktop program that can be launched easily, with the pet floating above other windows without getting in the way too much.

Please include the basic project setup, the cat animation logic, image loading, and a simple way to package or run it. Keep the code clean enough that I can later add more pets or tweak the sprites. Look up current Java desktop docs online if you need to.