I played through every Alex Kidd game when they came out, and you don't want to play Alex Kidd in High Tech world.
First you take a Sega quiz to get out of the house. (okay...)
Next you go on a quest to assemble the pieces of a fake passport (most of the game)
They turn down your fake passport (throw the controller)
Call Sega's free support line, they tell you what to do.
Go to the shrine to the gods you passed earlier.
Pray to the gods 100 times (use toothpicks on your eyelids to keep you awake, since every time you pray, they make you get up and walk away when you finish)
and a real passport falls out of the sky. You get the ending where Alex Kidd is playing a Sega game (Hi Tech World is an arcade). I think the game was Hang On, but I can't remember.
Anyway, I'm with you, Barry. I bought Centipede and Yars Revenge for my Arcade. I'm hoping for some sega games.