Make sure to complete the secret route for Mangle's Quest before returning for the other route. With the balloon unlocked, balloon platforms will spawn in the second level. Jump across these platforms to reach a flat blue platform, where a gray child sits; If you've collected the cake from Mangle's Quest, approaching this child will cause the cake to appear, with the child opening his eyes. The minigame will end, and Freddy's spirit will appear in Happiest Day.