The "dreamscapes" part comes from the fact that there are shifting, dream-like musical images that emerge across the span of the piece, while the "shattered" part is due to the frequently changing meters that interrrupt the smooth progression of lines. Interestingly enough, both Darrin and I independently thought it was like looking at an image through broken glass ("Through the Broken Looking Glass" was one possible title, but we decided it was too Alice in Wonderland), so this title seemed to fit well.
Also, massive props to Darrin for helping me out big time in making this a workable piece for marimba, and not just a bunch of notes that my computer plays real purty. The process continues, and I'm extremely grateful for the help. This is going to pay huge dividends as I write my percussion orchestra piece for the TCU ensemble.