Cool, i like it. Kinda hard to see whats on top of them, can you post some diffrent angles maybe upclose.
The Ice or Crystal one in the back there doesnt look good i would get rid of it or move it where that other lower floating rocks are in front of it.
The red one seems a bit too red and that platform floating below it needs work. I would keep going with those pointy rocks underneath the red one and make the whole bottom of it pointy and jagged.
If ya get some diffrent screen shots i could "help" you more. If i am of any help xP