Did you play "Twilight World"? I think ut was on of the good game on Atari. Interesting, difficult, not like other games. Whwn I played in my childhood I didn't finish it cause I couldn't complete level "Mirage". In 2007 I completed it on emulator and then finished the game. It's a pity that after last level comes the first level and there is no ending...
I began writing my memories, only to realize I was thinking of Another World ;) Twilight World was cool but I never completed it. I always managed to complete a couple of these worlds, and then I would lose all the lives I had.