To play you should have a wiimote with a nunchuck attached.
The nunchuck joystick controls the direction you look in.
Pointing the wiimote aims the weapon selected.
Pulling the B button trigger on the wiimote fires the weapon.
Pressing the A button on the wiimote switches between the primary and secondary weapons.Pressing the 1 button puts more enemies in the queue - good if you want to see more enemies right away ( they will still queue up and be released slowly according to the stage, but there won't be a lull between waves, just a constant stream of enemies until the queue is emptied ). This was intended mostly for debugging and playtesting.
Pressing home pauses the game, and brings up the menu.
From the paused screen you can press + or - to switch screens.
There are 4 screens with different options:
The debug menu