"Sun day black" is an iPhone lifestyle game developed by Phuong Thi Vu Minh. In this free-to-play game, you are tasked with defending the sun by eliminating aliens attempting to exploit its energy. As you progress, the sun's light gradually diminishes, urging you to upgrade your weapons with the help of vendors. The gameplay involves strategic movement and attacks by touching specific locations and using various skills to thwart the alien threat.

Immerse yourself in a thrilling adventure where the fate of the sun lies in your hands. Upgrade your arsenal, navigate through challenges, and prevent the sun from fading away in "Sun day black."