There are no installers for the game, it should just be a zip file containing the game itself. Please make sure you download the game from this itch.io page and not on any other sites.
I can assure you there are no viruses in the game, here is the full scan results from virus total of the game zip file: https://www.virustotal.com/gui/file/155169b0cd8683cfe47e131c939edc1db3e2ce9bceee2e7538f5f249a6123b77
If you want you can build the game from source yourself as the game is open-source: https://github.com/FieryLionite/A-Bellyful-Life