WARNING : Windows defender will likely get a false positive from the game
This is due to the library I use to create the .exe file (ocran) that apparently make it so the .exe has to download and install the compiler my game use, so the game can work without having to download and install it yourself manually before playing (and Windows defender do not like that at all).
At least, that's the likely explaination given in this thread: https://www.reddit.com/r/ruby/comments/nioqku/my_ruby_game_is_getting_false_posi...
To not simply take my word when I say that this game is safe, you can verify it yourself as the game's code is entirely open source on my Git Hub here : https://github.com/Bruoche/Ruby-RPG
Here you can therefore review the code for any risk yourself and even make your own executable via the Readme's instructions (granted you're techy enough to install the required dependencies and run it).
Alternativly, a thourough virus scan of the files should show a normal activity coming from the game.