Kid Icarus - Of Myths and Monsters (USA, Europe) ROM

A sequel to Kid Icarus on the NES, and currently the only one, Of Myths and Monsters is a fantastic game like the original. It might even be better. The gameplay is good and the music is great considering when the game was made. It also has a fair difficulty level.
If a) you've played through the original Kid Icarus and can't wait until Uprising comes out, or b) you just want a game based on Greek Mythology, then I recommend this game.

Mythical monsters are running rampant in Angel Land and Pit, the original Kid Icarus, must try to save the region once again. He must try to find three magical treasures hidden by Palutena. To accomplish this, Pit will have to fight new enemies and find old friends as he travels from the Underworld to the towers of the sky palace in Kid Icarus: Of Myths and Monsters, the Game Boy version of one of Nintendo's classic side scrolling platform or adventure games. Getting through these challenges is made a little easier by collecting useful items like hammers and hearts. Throughout the levels Pit will collect hearts, upgrade his strength, collect treasures, and learn to fly.