It turns out Picross works really well in 3D. As in the first game, working out the shape of the finished puzzle and chiseling it out appropriately works great on the touch screen. This game also adds a new complication in that blocks can be either orange (becoming curved in the final shapes) or blue (full blocks in the final shape) which adds more complexity to the puzzles and is satisfying when you see said final shape. It's a very robust second entry, a lot more than just more puzzles.