After completing every missions, the last medals required for 100% completion are the "King Of The Mountain Gold Medal", "Rail Kahuna Gold Medal", "Golden Mullet And Golden Chest Medal", "Rocket Ace Gold Medal", "Night Club Fever Gold Medal", and "Snow Trekker Lightning Medal". Select "Start" then "Continue". Tap the bottom left square for mini-games (marked with a blue penguin and light pink Puffle). Tap on the desired mini-game and get those medals. Note: To get the King Of The Mountain Gold Medal you must earn 1,000 points in each mini-game.