First of all the sound is really great!
The main (potion) mechanic is also intersting: the first time you "die" you think "wow, that's a twist. whats next?" and you really feel involved. 
People already mentioned, that checkpoints could be necessary, because player the penalty(begin from the start) is too big. But I think it could be ok and challenging in a good way  if the replay process won't be repetitious in some parts . E.g. axe area could be  one way only.

But on the whole the game was fun and I really enjoied it :)

Really interesting concept, it's a lot of fun. My biggest gripe was the lack of any checkpoints, as having to replay parts caused me to stop playing eventually. Perhaps that was a time constraint thing? Either way, really cool game! (nice choice of music also!)

Hi Good start I had some problems with the LOD, or Occlusion culling loading the different stages. The second staircase never loaded the next pathway so I could only jump to my death, outside the map.

It would be nice with some kind of checkpoint system or more forgiving death at this stage.

But overall nice prototype.

Hi, really loved the ghost mechanic! I felt the camera moved a little too fast for me and got a little confusing when it went through the walls, and I couldn't locate my player. Great job!