Prepare to cry, it's insanely hard. But the password function works well, it actually still keeps your items and health as if it saved the game. There are a lot of parts of the game that are waaaay out of date, but overall it's an enjoyable platformer if you get the hang of it and like a challenge.
Well lately I have just had this determination for NES, just playing games and finding gems, I have always heard Kid Icarus was good, but I have never tried it, looking forward to it though. Once again good work.