The high-pitched gibberish made by the gelatinous Chu-Chus is in fact the sped-up sound of two Japanese men arguing.
This is a high-definition remake of the original The Legend of Zelda: The Wind Waker (2002), with a few new features. Apart from the new interface which makes use of the Wii U's GamePad, the player can use the in-game camera (Picto Box) to make selfies. There is also an item called the Tingle Bottle for sending messages, tips and pictures to other players over the Miiverse (which no longer functioned after November 2017 when Nintendo discontinued the Miiverse service). In response to prior criticism that sailing took way too much time in the original game, there is a new item called the Swift Sail (available after completing the Dragon Roost Cavern dungeon). This sail gives Link's boat top speed, and automatically changes the wind into the sailing direction, greatly reducing the time for travelling between islands. And lastly, the search for the Triforce shards has been shortened by eliminating some of the sea charts necessary for finding them.
This is the first Zelda game which has a Hero Mode (the most difficult setting to play the game) right from the beginning. Hero mode means that the player receives twice the normal amount of damage, and there are no hearts to recover health. In The Legend of Zelda: Skyward Sword (2011), this mode could only be unlocked after completing the game once. In Wind Waker HD, the player can even toggle this mode off at any point if gameplay becomes too difficult.
At night, there are actual constellations in the sky.
Continuing an often-overlooked tradition of the Legend of Zelda series, Link is left-handed. This is because creator Shigeru Miyamoto, although ambidextrous, prefers to use his left hand.