This is simple. Find an image that represents what you want a game to be about. Post it here.
SUBMIT WITHOUT COMMENT.
This is for images, let them speak for themselves.
EDIT: you MAY -if you choose- credit the source of said images, but keep it very brief, linked, and without further comment. NO "this is a drawing by David Paintswithhisfeet, his horse paintings are awesome sauce with a cherry on top." That kind of stuff is right out.