Great Jam entry - really atmospheric and the audio is fantastic (although, I did miss the humour side of your other stuff, but I know it wouldn't have worked in this).
Very well presented, the lighting, textures and effects were spot on.
I did feel the crystals were a little too easy to destroy, the visuals looked like they were hard and solid, I would've expected to have to take several swings at them to destroy them - but it just took a gentle touch.
Couple of minor bugs I encountered, firstly when you throw the light stick, it can spin uncontrollably and looks quite wrong. Also, when I lit the last torch, the pathway visually opened up, but I couldn't walk to it - looked like the collision was still blocking it. I managed to still complete the game though by throwing the torch at the last objective.
Those are just minor things though, like I say, the visuals are stunning, the atmosphere is spot on and the audio is just fantastic - great job dude!