How does your submission match the theme?
Controlled with only movement of the phone, looking around steers, bouncing your knees moves, bouncing larger jumps, looking down at tufts of grass eats them but loses you potential to see predators (which I didn't manage to add to the game). I also contemplated another verb that rabbits are renowned for... though as a slightly less PG game!

EDIT: Private Google Play link is easier to use -- available on itch.io page or:
https://play.google.com/apps/testing/com.ugs.funnybunny

Third-party resources
Unity engine 5.6.2 (I lost a lot of time through 2017.01 incompatibility with Cardboard :-( )
Rabbit model : https://www.thingiverse.com/thing:151081 (CC-NC-AT)
Heartbeat : http://freesound.org/people/thenudo/sounds/146765/ (CC-0)
Rabbit eating : http://freesound.org/people/dobroide/sounds/84141/ (CC-AT)
Google VR : https://developers.google.com/vr/unity/ (open-source)
VR-Step : https://www.assetstore.unity3d.com/en/#!/content/60450 (owned asset)
Toony Colors Pro 2 (toon shader) : https://www.assetstore.unity3d.com/en/#!/content/8105 (owned asset)
Low Poly Vegetation Pack : https://www.assetstore.unity3d.com/en/#!/content/80146 (owned asset)

Contributors
Only me