Very fun game. I didn't check if there was any instructions for playing, but I think I managed to figure pretty much everything out after about 4-5 rounds of the game.
The only thing I'm kind of missing in the game is with the (I'm assuming procedurally generated) shape of the rooms, it would be nice if it would somehow design itself in a way that allows the cable to be untangled. I realize this might not be possible depending on when in the game you handle the generation, but I managed to disconnect my HMD once while playing from the tension of the cable being so twisted.
I bet this game would really be amazing with a wireless headset, as just walking around already adds a lot immersion.