Hey! I played Stonesight a few times now, and while it is definitely a bit short on content the feeling of lifting the stones by looking at them was really awesome. I also like how minimalistic you guys designed the interface, it's nice to have almost no barrier between opening and playing the game. Especially since the concept "Look at things -> levitate them" is easily understood and happens almost on accident the first few times.
What I would really appreciate though is an incentive to blink sometimes, and maybe relax the neck and head. I noticed unintentionally making really sure not to move my head so as to not lose the focus on a stone. One time I believe that contributed to a migraine I was developing.
I would also really like to see some more content, puzzles with three or more such goals, maybe having to build specific or certain paths or something like that. I'm sure you can think of something!
All in all I really found the game intriguing and definitely would like to play again. My experience was very similar to when I first tried VR.