Cheerful Comet Over a Colorful Alien World

Cartoon-style scene: a cheerful comet with a smiling face streaks across a neon sky above a quirky alien planet. The landscape features oversized mushroom-like plants, crystalline blue mountains, and neon-green grass under a pink-purple horizon with two playful moons. In the foreground, cute aliens with big eyes and antennae cheer and wave as the comet's rainbow tail sweeps overhead, leaving sparkles and starbursts. Bold black outlines, flat vibrant colors, and simplified shapes capture classic cartoon charm. Slightly low, ground-level perspective to enhance depth with distant ridges and a whimsical atmosphere.