Regulator puts you in a sample level where you learn all of Samus? various controls. You control the bounty hunter?s movement with the D-Pad (or face buttons if you?re left handed), and fire with the shoulder buttons. You also aim, switch weapons, and go into morphball mode with the stylus and the touch screen.
When I first played Metroid Prime: Hunters at E3, I had no problems picking up the controls. But at the time, it was strapped to a table and I didn?t have to worry about holding the DS while playing the game. Since then, I was worried that it would be difficult to hold the system and control the character at the same time. Thankfully, this is not the case.