Yea solar jetman is in my top 10 list of fun and challenging games on the NES. I had it when I was a kid and used to spend hours sitting there drawing maps out of all the items and large enemies. The crystal planets are my favorite and once you get the Neptunian space pod that can go through wormholes it helps a lot! The weapon powers up are pretty sick in the game too. As was said it is not for the faint of heart, and to this day I have only ever beaten the last level once, the golden warship is so fragile!
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Looking for Black cartridge Color Dreams games, last 3 I need: Metal Fighter, Moon Ranger, Baby Boomer. Please contact me if you have any of these!