SquareShift comes from Will Hain. The object is to rotate groups of squares of 2x2 tiles to eventually transfer the blue squares into the glowing blue targets.
There are 60 levels.
The first 15 levels - straight forward.
The next 15 levels - some squares are locked in place and cannot be rotated.
The next 15 levels - some squares have #s which indicate the maximum number of times that square can be rotated. These are challenging.