Latest build here:
http://files.slembcke.net/temp/InterTrans.nesHold B while ramming the signal to give it a boost in your current direction. Fill the board with it. (Win condition not currently detected.)

So it's sort of a mashup of a puzzle game that I've been avoiding finishing for years:

Basically, you start somewhere, then can move in a straight line until you hit something. The goal is to fill the board.
Highly unfinished HTML5 version here:
http://files.slembcke.net/temp/PuzzleSn ... Snake.html(No win/lose condition, have to reload the page to get a different puzzle, no instructions, etc)
The biggest problem we have is that the puzzle snake levels are 5x5 (easy) to 8x8 (pretty hard) in size. For the NES version, we are doing 12x12... Even after giving the player the start position, it's still pretty brutally hard... and we still want to add enemies or something to make it more interesting. At this point we have ~3 hours to finish it lol, so suggestions won't do much good.