Sure.

I didn't mean to suggest that it all be 1 image; only the buildings. Instead of 50+ images, you could use just 3 (buildings + clouds + agent).

I'm still on puzzle 4, so I'm not sure if what I'm suggesting is even relevant to the solution. The iPad puzzle though established the idea of pixel-perfection, and so my first thought was to start measuring the number of pixels. To do that I needed to take screenshots and piece everything together into a pixel-perfect image. Not exactly the hardest thing in the world, but could be made easier.

Also, the separate parts of the image can become misaligned when zooming out in certain browsers. Here's what it looks like for me in Chrome: http://i.imgur.com/eYRWdCP.png