Where to start? This game was incredible! 1) The feel of the entire game kept me both mystified and on edge from the outset (music was perfect for both upper and shadow world and not too repetitive). 2) The plot of the game was constantly hinted at but never fully revealed until the end. 3) The difficulty was just hard enough to get me thinking but not frustrated. 4) The symbolism of the game was very kool and the design of it only helped it (I remember just sitting in the shadow world listening to the various noises/the contrasted clarity/the shadowing effect/dying in the underworld vs dying above ground/etc). I love these types of games - they are simple and well thought out and keep those of us who are no longer children in the imaginative/magical mindset