Here's what he said (paraphrasing)
I don't have a demo yet because I need the graphics to start programming.
What? Last time I checked, you write the game first, then get graphics. In case your game fails, or it doesn't work out for some reason, the artist just wasted time making graphics for you, and NOBODY LIKES WASTED TIME.
Use placeholder graphics first. Once the game is finished, then you should get graphics.