Thanks for all the input guys! REALLY helps. I like the idea for a smaller zigzag in the background: that would fit my goals perfectly. Different textures, especially for the background and small brick textures, will help a lot too. Part of my biggest difficulty is getting the structure right for the garden. You can see from the sketch that there really isn't any large brick structures, though the floor had large slab tiles. The goldenish bricks was an attempt to translate the dream into a KS level. I keep thinking I need to lean more towards a white brick with orange and gold highlights here and there. I'll keep the dark outlines in mind too.
And thanks for turning me on to Island of Mimir! Wow, very unique style. Wish there were more tilesets like this. However, it is a bit too painterly to fit in with what I'm trying to do. I had though in the past about doing a level with similar tilesets, but it would have, I think, required me to do some RL painting to base it off of, and I'm not prepared to do that. Maybe not thought... Anyhow...
Is there a temporary tileset compendium or torrent somewhere? I don't have many tilesets and it would help a lot if I could look through a library of them.