Earlier today, Unity notified developers of a security vulnerability affecting applications built with versions of Unity from 2017.1 onwards on certain platforms. The vulnerability consists of command-line argument injection which can lead to loading arbitrary code from unintended locations.
Cats are Liquid - A Better Place was affected by this vulnerability.
Patched builds of the game were released earlier today to remedy these vulnerabilities. While there's currently no evidence of any exploitation of this vulnerability in the wild, please update to the latest version of the game to safeguard against potential exploitation.
For more information, see Unity's Security Update Advisory as well as the official CVE record.