The basic idea of the game is this - lay down Tetris-like pieces on a field and attempt to make perfect rectangles with shapes of the same color. What's working against you? A kremling circling the field and reducing the useable area - you've got to push him back by completing the shapes.

I noticed that shapes could be placed over ones of a different color, but not over the same color. I wonder if there's a score penalty...? Or, maybe it's a good way to pursue multi-shape clearing...

It seems that pre-planning dominates over quick reflexes here - as long as you don't create a mess to deal with, you can clear pieces at a good stride and needn't worry much. But then there's another mode that starts with a mess...

Oh yes, and the game is pretty fun, too.