Underworld Trip
I love the hell (hahaha) out of this short little flash game. Check it out, and enjoy roaming (going left to right) around the different layers of Atari 2600 Hell. As far as neo-retro games are concerned, this and games like Bit Trip Runner delight my heart to no end.
Hope you make it through to the other side in one piece.
*not really a spoiler* You get better endings depending on how many lives you lose or don't lose.