Eurogamer writes: "Button-mashing is a familiar part of the gaming landscape. Who hasn't, at some time or other, fluked their way through a bastard-hard hackandslash battle by jumping around like a Tartrazine freakoid and hammering random attack buttons until something comes off? This kind of combo trickery can be pulled off in a way that - to the untrained eye - looks calculated, skillful and deliberate. But don't be fooled. Even the most hardcore games tend to kneel to the all-conquering might of the persistent, determined button-masher.
In the process of bringing the Ninja Gaiden to the DS, Team Ninja has come up with another brilliantly random gameplay mechanic: screen-scribbling. If the screen is loaded with gurning enemies, your health's going down and your best-laid plans are all going to pot, a quick, concerted scribble winds dear old Ryu Hayabusa up like a clockwork toy. In a flash, he's zipping around the screen slicing people up. It's only one of many of the moves available to you in the course of the 5-6 hour adventure that constitutes Dragon Sword, but it's critical. Indeed, much of the gameplay bears a closer resemblance to getting a spiteful ball point pen to function than skilled, hardcore action-adventuring."