Really nice game, it is difficult to grab the packages, but personally I found it part of the fun as they kept slipping off my hands at the last second. I had a similar concept for my game and was thinking yours could be implemented without the need for artificial locomotion. Just put the conveyor bands around the player and that way it becomes a lot more accessible to people who are new to VR, check out my game to see an example of how it could be implemented.