The idea of making the window itself into a virtual pet is awesome, and I can already imagine a lot of interesting possibilities if you decide to take this concept further (maybe the player could click and gently drag it back and forth across the desktop to rock it to sleep). That being said, the lack of a full-screen option is conspicuous; I'd love to expand the void across my entire laptop and make the computer itself into my little buddy. There are a handful of simple, but very effective creative choices here. The airbrushed body, the way the chicken leg just vanishes into it, and the eerie hum of the audio all give this creature a whimsical, otherworldly vibe that I really enjoyed. Great work!