It reads almost like a fairy-tale. Love the poem-like beginning and the maze of the Basement, which is rich and almost (positively) suffocating in its descriptions. Sometimes however, there is almost feeling of tongue and mind being twisted by the words, which makes the understanding of the text a bit difficult. (Though they mirror perfectly the feeling of the adventure itself.) The ending is lovely (also very fairy-tale like). I would run this adventure!
P.S. Dunno how "cyberpunky" it really is... it feels rather more dystopian / post-apo.