I’m not the developer of this game but I think I can help.
I think you might have removed the “.exe” from the file name (Game.exe). [Windows]: Go to file explorer >> click on “view” tab >> Make sure “File Name Extensions” is checked >> rename “Game” to “Game.exe”. Let me know if it works. BTW, you need to extract the rar file before running the game (I’m pretty sure you know it already but just saying just in case).
