It's great to see more GearVR games coming to Cardboard! I've only played the first few levels and am now stuck in a room with a blue box and a green one and can't figure out how to solve it. But the game runs well, doesn't make you look behind for anything, runs really smooth with no dropped frames on my Galaxy S5 (will test on LG G3 too).
Best game for Google cardboard. Best game on VR I've played. Make sure you have a controller. Sometimes seems to crash (or possibly context switch) on the elevator after the tutorial.
How do you get the box in the chute. The controls are a little sensitive to jump on the boxes with any accuracy