On December 22, 2020, Palthea announced a "Steam Wishlist campaign" for My Time at Sandrock. In exchange for more people adding the game to their Steam Wishlists, more features would be added to the game prior to the Early Access release, such as the ability to wear makeup and expanded furniture customization. Most notably, the 250,000 wishlists goal added the ability for children to grow up to at least primary school age - one of the most highly rated features of the game's predecessor, My Time at Portia, and was previously listed as a stretch goal in My Time at Sandrock's Kickstarter campaign, though said goal was not reached there. The wishlist goal was reached in June 2021.