The atmosphere, created by the darkness and that music was great, the controls are a little bit hard to use though

I like the feeling of a dark endless void brought on by the audio and dark environment.

I tried to nerd pole my way up so I could just leap across the whole level, but you predicted that by adding in an upper boundary as well as well as a lower one - tricksy developer :p

Overall it was an interesting concept and it felt kinda ominous being surrounded by darkness. I felt like the jumping could be improved a bit, it was far to easy to just go running of the edge of platform and falling instead of jumping (needed some coyote time, perhaps).