Nice. To be honest, I assume people who play Mirror's Edge or parkour games would find this much easier than me, but I struggle with first-person platformers, I don't know where my feet are, so I tend to either jump too early, or else constantly look down and then I miss your beautiful stylistic scenery. If you like gamedev videos, check out Mark Brown of Game Maker's Toolkit, the "Developing", series - he hit a similar question of skill versus puzzles when designing "Untitled Magnet Game".
Well done on the little details that elevate it - the particles, the broken glass, the sound effects. A lot of people have already mentioned the atmosphere or the feeling of being immersed, and I got that too. Overall, well done!