I haven't played the original game, but have always been intrigued by it, so was excited to see this proof of concept. I ended up disappointed, though; the controls make it hard to move, to time jumps properly, and mount after a climb. In addition, initially I could only grab the arrows from the center; I had to holster an arrow and unholster it before I could grip it properly for shooting. I could also only holster one arrow. I guess we don't have quivers in this game?
There was also very little feedback as to whether you were doing any damage on the weak points. The only indicator was the health bar of the enemy, which was on the ground. Also, stabbing and pulling the sword back out both felt bad. I had to slowly push the sword in, as going fast and hard just slipped and didn't go in. I had to practically back up across the room in order to pull it back out for another stab.
After falling off the colossus, I tried stabbing the foot and lost the sword entirely. The arrows can't be shot high enough to reach the upper weak point, so I was unable to get to a win at that point and gave up.
I love the concept, and I understand the game is by design hard and frustrating. However, I feel the controls and sword mechanic need to be tweaked a bit more for VR, as pulling your arm three feet from the perceived location of the sword and still seeing no movement is not realistic or satsifying. Developer, please keep working on this, as I think you have a potential winner here if you can get these issues fixed.