The Apocalypse Arrives, and I Awaken a System to Become a Powerhouse

[Interstellar + Sci-Fi + Post-Apocalyptic + Zombies + Natural Disasters + Superpowers + No CP] The protagonist's golden finger is ridiculously overpowered!!!

The novel is entirely fictional. Please do not take it seriously.

Four months before the apocalypse arrived, Mu Lanjin unexpectedly awakened a System and learned that the apocalypse was coming. She frantically stockpiled supplies. After the apocalypse began, she cut ties with her awful relatives and leveled up by killing zombies, only to discover that this was merely a selection process.

"Why? We're all living beings. Why should so many people lose their family and friends just because of this selection?"