This looks great and a lot of fun. I love the challenge on the second-to-last-screenshot with the Chuck there. (although I wouldn't be surprised I'm the only one to like that, as it seems not really easy at all, lol.)
I agree that the rope-ends don't look too great. Looks a bit like glitched graphics on first sight, mostly because of the lack of any outlines. If you would find something like that with outlines of any kind it would look clearly better in my opinion, but I'm also not sure wehter there's something suitable in the Rom or not.