AppUnwrapper, Can you check Level 6.7? This is one level in which no matter while piece I select as the anchor, when I try to move two pieces in unison, I could only move the peripheral pieces. The "center" piece is stuck in the center and could only the manipulated with rotation around its axes. Is this a bug? If not a bug, I suspect that this is a deliberate hidden constraint to limit the combinations that could be made otherwise. This level is also a good example of how the developer is blinded to their own solution and constructed pieces that gave no clues individually to what we are supposed to find. While the pieces may make decision if you know the final shape, it is an observation that can only be made in hindsight. As a puzzle, however, this level completely fails because it forces you to discover the solution by pure trial and error and not by deduction. The blocky contours of the pieces make it possible to cast silhouette with many configurations of "straight" edges, none of which are helpful if you don't want know what you are supposed to see.