This quarantine warning is triggered by itch.io's automated security bot and does not mean the game contains any viruses.
This is a Chinese development studio. During active development, they do not have much spare time to polish their store page. They may use tools such as VPN to access this international platform, which creates multi‑region login records and triggers this security flag.
This is a legitimate game. Things will get better as development moves forward, Hope you have fun playing！