Opinion of Game Elements

This is an example of a screen from a game I am developing for the iPhone. However I’m not sure I “like” certain elements. The objects at the top of the screen are to be dragged into the lower portion, where they can be rotated (buttons at bottom).

The elements already in the bottom section cannot be moved, but some MAY be able to be rotated. Right now, if an element has a RED background, it cannot be moved, if it has a RED Corner it cannot be rotated

Does anyone have another idea as to how those to object states could be depicted

Ive decided (for now) to do this.
When the user selects a cell… a border appears around it. If that cell can be moved, the border will be blue, otherwise it will be red

If the cell can NOT be rotated, the rotation buttons will simply be disabled