Which one do you tackle first when starting a project? Is there any plus/minus in starting with one subject?

I'm not really a 'programmer' myself and more into an 'artistic' person. So this kind of question always pops out whenever I want to start a new project.

What do you think?
Thank you!

hi

I work on both art and program at the same time. But I now try to start with a basic game idea (usually to get movement and basic design finished). then I work on adding the graphics and let the game play emerge with it. I take breaks to work on other stuff and then come back too.