
So, I followed your guys' advice as well as I could. I found a few different types of blocks and rocks, and replaced a few of the crystals with them. I also implemented my Layer 6 lighting graphics (which are animated at the same speed as the torch flames), and tweaked the palette to try and make up for the darker room. I also made the minecart graphics and put them in as well. There aren't very many, because I was trying to hide the point that there isn't any real practical place to put them, so they go off-screen in directions that the player cannot make the screen scroll. This means that while they're there occasionally, there aren't very many of them. I didn't add in the light shafts from above causing slight vegetation idea, mainly because I'm not entirely sure how I'd draw that.
As it is, I'm not entirely sure on this. The original palette for everything turned too many shades into flat black when I added in the lighting, so I switched some colors around. However, now I'm a bit afraid that the center height level looks too orange. Any opinions on this version?
By the way, I already know that the bombable wall sections don't match the rest. I haven't redrawn those graphics yet. They seemed like they'd take the most time to do, and I didn't want to waste all that time with something that I might not even be happy with.