I have support for both a gamepad (and oculus touch controls as soon as I can figure it out) but also for mouse and keyboard. Here is a video showing using the mouse and keyboard in the game, and it works much better than gaze controls for reducing nausea, since you can move your hand without moving your head. Having to look at whatever I want to shoot or pick up, makes me sick.
I use the mouse pick the same as anyone else would, except it casts into 3d virtual screen space. It is hard to explain, but it feels great. Touch controls would be ideal, but until EVERYONE has a touch, I want this option as the main option. Gaze controls are OKAY, but increase nausea for many like myself, because you have to move your head around.
I already have the Xbox 360 gamepad controls, which centers your hand and uses gaze controls, but trust me when I say using a Mouse is superior in many ways and preferred. But this means I still need Mouse Pick to work correctly if you have ANY ideas about how to correct this.
To be specific about how this works, your game still shows up on the computer screen in 2d, while you are in the headset, and Mouse Pick works normally on that. It means that the mouse moves when your head moves, but it also means that if you keep your head still you can still move the mouse around the screen, and I have a bounding sphere to keep it a specific distance from the player's face. I cast a mouse pick that hits that invisible spherical barrier around the player, and that is where, in 3d vr space, the hand gets placed.
I appreciate that this sounds weird and foreign, which excited me into thinking I have done something special, because this kicks gaze controls' ass in terms of feel and natural movement.