as "Traveling Spirits" in the future, which players can give their candles and hearts to receive seasonal items for a limited time, albeit at a higher price. Music Sky features an orchestral score composed by Vincent Diamante, with some tracks performed by FAME'S Macedonian Symphonic Orchestra. Norwegian singer Aurora also provides the vocals for the game's intro and outro songs. Three volumes of soundtrack albums have been released. The first volume covers more recognizable music from the base game cycle. The second volume contains mostly ambient background music, and the third includes various pieces composed for Sky'''s Seasonal Events. Charity In 2020, Thatgamecompany held some in-game events in support of charity. First was the "Days of Nature" event, in celebration of Earth Day, during which a unique IAP (in-app purchase) was available. Proceeds from each purchase of the IAP were used to plant one tree per purchase, in partnership with the OneTreePlanted charity. This event resulted in a total of 40,576 trees planted across the Amazonian and Australian forests damaged by wildfires. In April 2021, Sky hosted its second "Days of Nature" event, using the game to promoting awareness towards plastic pollution of the ocean. In May 2020, Thatgamecompany hosted a "Days of Healing" event to help raise money for the Médecins Sans Frontières organization, leading Thatgamecompany to donate $719,138 to the MSF COVID-19 Crisis Fund. For the event, Thatgamecompany also joined the World Health Organization's #PlayApartTogether campaign. In June 2020, Sky held its first "Days of Rainbow" event, featuring colorful rainbow items and spells as a way to celebrate pride month. The second "Days of Rainbow" event the following year gathered funds for The Trevor Project and the Global Fund for Women, with players raising $794,420 in total. Reception Review aggregator Metacritic awarded the game an 82 out of 100 based on 18 reviewers, as well as awarding it the number one shared iOS game of 2019, number three most discussed iOS game of 2019, and number 13 best iOS game of 2019.Game Informer scored the game an 8.5 out of 10 stating "Sky is a refreshingly moving and robust game on the iOS platform, and one best shared with others – especially folks who might not normally pick up a video game." GameSpot scored the game an 8 out of 10, giving exceptional praise to the visuals, animations and musical scores, however admitting that "return visits to previous