You do very well. If something makes you suspicious, then it is best not to download that game.
Some alternatives are to try https://virusscan.jotti.org/
You upload the executable and it scans it with different antiviruses.
It is also recommended to use virtual environments, that way if the game has a virus, it cannot infect or cause damage to your computer.
There are several posts that give recommendations, for example this one:
https://itch.io/t/3040890/how-likely-is-it-to-get-a-virus-from-downloading-somet...