A password is only useful for simplier games, sure.
If the password is getting too big, a switch to savefiles is the only useful solution.
Thankfuly, that's not that difficult. A quick hack would be to save the password in the file, and show a list of found savefiles for the user. (add a string, that the user enters when saving, in the savefile that you display to the user instead of displaying the filenames, of course)
If in doubt, use savefiles.
If the password is getting too big, a switch to savefiles is the only useful solution.
Thankfuly, that's not that difficult. A quick hack would be to save the password in the file, and show a list of found savefiles for the user. (add a string, that the user enters when saving, in the savefile that you display to the user instead of displaying the filenames, of course)
If in doubt, use savefiles.