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This interaction features a central app icon with a colorful gradient background on an onboarding screen. Inside the icon, a white padlock undergoes a looping animation: the shackle slides up and rotates open with springy physics, while the body of the lock wiggles slightly. This playful micro-interaction visually reinforces the concept of unlocking a reward (a special app icon) by inviting friends, making the achievement feel tangible and engaging.
