ArrayPrefs and PlayerPrefs

ArrayPrefs and PlayerPrefs are not viable option...Unitron does not recognize them. How do I present to a player(s) the option to input their name, play the game with a final score then keep that info, while still allowing follow-up players to do the same?

PlayerPrefs are only stored on the players computer. It would be better to store information on a server.

Take a look at the wiki: Server Side Highscores

Good starting point with SQL, PHP and JS code.

For user input (string) you could use GUI.TextField.

Use PlayerPrefs and ArrayPrefs. Whether Unitron "recognizes" them or not is irrelevant, and has nothing to do with whether they work (because they do).