Thin Ice is a game located in the Arcade. In it, the player must steer a Black Puffle that is on fire (probably by the effects of O-Berries) through a maze covered in ice, melting as many ice squares as they possibly can along the way - while collecting items such as coin bags to earn additional coins. There are no lives, and levels can be passed without completing them. There are 19 levels in total.
Thin Ice is one of the Games upgraded with the release of Stamps. Members can play the full game, whilst non-members can only play the first ten levels, which has sparked havoc in the non-member community. If a player has all the stamps about Thin Ice, they will get double the coins they win in the game (scoring the equivalent of 200 coins will give the player 400 coins).