Since there is no good documentation for my player right now here is an example on how to bundle player configuration and game file with the player:
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For configuration you just need custom.ini in the folder with executable file. You can set any default options you want. I'd advice not to include settings like geometry and windowState that rely on users screen resolution and physical screen size.
You can bundle the game by adding all the required files to standalone_content folder which should be located in the same folder with the executable file. The main qsp file that will be loaded by default should be called game.qsp. All the other files will be ignored so you can add modules if you require them and it would still work.
To start the bundled game set autostartLastGame=true in the configuration file. In that case lastPath and lastGame settings can be left blank as they will not be used in this setup. Everything else can be changed to the settings required for the game.