If you have downloaded a Unity Standalone game folder, and the game crashes or has problems, you might need to check the Standalone .exe logs.

They are in the following folders:

macOS ~/Library/Logs/Unity/Player.log
Windows C:\Users\username\AppData\LocalLow\CompanyName\GameFolderName\output_log.txt
Linux ~/.config/unity3d/CompanyName/GameFolderName/Player.log

Check the above folders for your operating system and check out the log!