Level design was very good but I think you overall look at lighting from scene view. There was a lot of overexposure areas in the game that would look good from far away.
I had some parts that this turns upside down and and game got very dark. Like black.
Now after this part I know you did not have enough time to finish the game and most of the things I will say will be answered by not enough time. I know and that is ok.
At my first play I only encounter 1 skeleton till the dragon part. After I killed the dragon I had no where to go and jump down to suicide. It was not the fall that killed me there was some creepy skeleton dudes in a circle doing some cult business. Unlike the dragon who got the motto "Make love not war" this dudes were serious and killed me.
After I re-spawn now the path to the dragon had the skeletons but this time I just dodge them and I just jumped down when I meet the love loving dragon.
This time the cult skeletons were not there and I go up in a corridor of prototype walls. Which lead to the dragon again, I killed him again and I guess there was no ending so that is the end of my play through.
I enjoyed the adventure. I wish dragon used protection.