Thanks so much for the responses. I've had a good read, in the directions you've pointed me, and I feel a little more confident about the project now, so I really appreciate it. Though I had some ideas, I was originally hoping to work with a programmer and refine them to something great for the 2600, rather than display them as complete and risk Simon Cowell style ridicule
After reading some of the stuff you linked me to, I've changed my ideas somewhat - the character I'd hoped to use isn't really suitable for the graphic restrictions of the 2600, and some of my other stuff would work so much better. I've had a heap of work piled on me at last minute, but I'll be back with more info and stuff within a couple of weeks or so. I'm definitely gonna play with Batari basic, it looks great! Having said that I don't really want to shift this project onto the back-burner, so I'm still hoping someone will be interested in working with me.
On a side note, my Atari's coming in the post any day now, so I'm quite excited. I've had a few in the past, but not since before I last moved, and then I had the Jr version.
Room 34, you're right that my main objective is to work on the graphic side of things, however it's important to me for it to tie in with my other works by sharing characters, music, etc. Would love to help out with other people's projects though, so when I get free time, I will certainly follow up on your suggestion.
Many thanks!
Rik