"On-rails Shooters: Not just for the Wii anymore.
The on-rail shooter is a genre we saw frequently on the Wii, rivaling mini-game collections as the genre the system saw most often. It’s easy to see why that was: the Wii remote’s pointer allowed for that type of game to be done more easily than any console that came before it.
Conversely, the controls available on the 3DS make that choice of genre seem odd. Heavy Fire: Special Operations 3D takes the same kind of shooter you’d see in Wii games like Ghost Squad, but has you aiming with the touch screen, a considerably less intuitive interface.", writes NintendoWorldReport.