Alex Kidd in Miracle World is a game for the master system that involves punching things in the face and playing rock paper scissors. There is some minuscule plot about saving something or other but I was getting so frustrated with the later levels that I forgot it.
It's sort of hard to say stuff about Alex Kidd, I mean it's a good game but it's just a standard platform game. It does this thing where you get items but barely any of them are useful outside of certain levels and you'll find that you spend most of the game just punching things in the face. Also I find the rock paper scissors thing really annoying because the first two throws for each boss are always the same, but you'll never know what they are first time (obviously) and the only way to find out is to play it over and over. Nothing game breaking but just little irritating things but the game itself is a ton of fun, so playing it over to learn the RPS patterns isn't all that big of a deal.
A cool little fact about this game is that it came packaged with the Master System, but you never got a cart for it, it came built into the system. By turning on your Master System with no cart this thing would boot up. Free, convenient and a lot of fun, worth playing if you want some retro goodness in your life.