I walked right for long enough and came across a couple more shops. I got 6 artifacts on the way, all imitations, and after a while I hit a wall. I managed to sell every single item I had and make it to the other side by mining in a straight line going right, on the sixth block down. This way I got the maximum amount of depth while also being able to view when I passed a shop.
 "Button Tycoon 2"){kind=icon}
 "Dwarven Miner"){kind=icon}
Thanks for feedback! Can you be specific on areas with poor graphics? I should be able to fix within an hour.