I'm sure you could do a game that feels close enough to Super Hexagon on the 2600. Especially with the Melody. I bet you could even get some great music in there (I wouldn't even attempt it without a good techno track).
I have to say I'm disappointed with how people responded in this thread. Yes, peachstapler is a new user here, but that doesn't mean people should just gang up on him because his first thread is about selling copies of a project he worked on. I have no doubt that he created the artwork (after looking at his website), and there's no need to tear him down just because it's a common and generally despised game.
If you don't have anything positive to say, and I'm looking you atari181, then how about moving on to the next thread. Nobody is forcing anyone to buy a copy of this game.
PS: Atari181, please change your avatar or I will remove it, as I wouldn't consider that safe for work.