The quality of the game is very high. I enjoyed it very much. The graphics, story and puzzles are excellent.
The introduction was a little to long in my opinion. After a "cinematic" intro you had an in game one as well. Maybe it is me personally but I started to lose patience and was eager to start playing the game already.
The emotional first person intro was very immersive in my opinion.
Using the lantern in cave to reveal only part of it was cool idea. I think that this idea was under utilized. You could hide and object somewhere in the cave and turn it I to an exploration puzzle.
The crocodile puzzle was a good idea as well.
In the idol room I was expecting one of the idol to be different so I checked each one of them

The crack in the wall was a little hidden and took some time to find.
Overall, if someone told me this is a chapter in full featured commercial game, it would not surprise me.
You built the character well and this story could theoretically be expanded into a series of small advanture games or even a whole franchise.