This was enjoyable, although I admit I gave up when I got to the grapple. I'm usually not up for puzzle games but I did give it a shot! Music is top-notch though, although that's a given (for some reason I feel somewhere there's a mystery to be solved just because of the musical atmosphere).
I do have a gripe with the download having too high resolution so I had to ALT+F4. My little bucket of tubes is not advanced enough for Unity standard settings.
Cheers!
/Kris