So does anyone know on how i can open the game because im having a hard time with it
For Windows, Mac, and Linux, you first neet to extract the file you've downloaded. You can use, for example, WinRAR to do that. Then you run the Resident_Lover_Demo executable from the extracted folder. If you are on Android or Chrome OS, you will need a file manager to install the .apk.
If this doesn't help, do get back to us with info on what the issue is and what operating system you are using.