console game issues to fix

I have created a console game on Visual Studio, which runs on Windows okay, but I've used Lib for Windows and it won't run on Linux. Help to fix this issue and add some more snippets (for start screen, and dynamic screen size) which is the cause of the issue I guess. I need modular codes from the single file code I've used, in terms of items, and moves in the file. see the attached file for task-related reference