Duolingo Tap Chest Open Card Spin Interaction

When the user taps to upgrade or open a chest, the chest reacts with bouncy spring physics, expanding and flashing as its rarity upgrades from Common to Rare. Tapping to open triggers a particle flash as the chest lid pops open, after which reward cards spin and scale into view sequentially. Each card tap advances to the next reward before smoothly returning to the main learning map.