Cool game! Getting to the darkness took me around 15 minutes. Here's some of my thoughts as I played:
Pros
-Nice and interesting dialogue with accompany gasps. Some of these gasps are pretty funny.
-Intriguing story, I was captivated by the the "ascension" was going to be
-Really cool map design
-I liked the speed-up button for movement
-I like the background music shifts
-DIMENSION SHIFT WAS SOOO COOOL
-I liked the text placed in the air in the 3D mode
-I got a bit confused from story line text, but it added a sinister atmosphere
Cons
-I wish I could use WSAD alternatively to move and navigate
-Player turn speeds were a bit slow for me
-I think I walked into the black area near the beginning, not sure if this was intentional Some blue box mentioned this, so I'm guessing this was intentional :D
-I wish the colored boxes had unique sprites
-3D perspective I could see through some of the walls as I got really close
-Would be nice to have an end screen, but perhaps I didn't get to the end
-Would be nice to have an exit for the game, I had to close it by killing the window
Great job! Really cool concept :D