Swinging mechanic is a bit hard to get used to. To me it seems inconsistent. Sometimes it will hook onto something and sometimes not.
I do LOVE the camera changes when you swing.The city looks amazing at night (maybe make the hook glow in the dark as well?). City looks beautiful when the sun is setting.
You have a lot of ambient sounds which is nice for setting the mood! Hearing the helicopter all the time can be a bit annoying, since I just want to hear the birds and wind sometimes.
Having sound variation for hooking would be nice since it is repetitive.
Otherwise great polishing!