I'll be honest with you, a lot of unity games on Newgrounds are unimpressive, but this one got me pretty good. I'll admit I found myself playing this for a while.
I'll start off with the things I like,
- Music is calming, which is good for this type of game
- GUI and art is great, suits the game. (Though they do feel a bit like pre made assets)
- Most of these games have limits that make the game require some thinking. I think you've accomplished this with the rope limit
- I enjoy the animations
I do think your game overall is pretty good, but here are some things that I found that maybe you would consider fixing/adding:
- The game starts to get repetitive and boring after a while. Most games of these types avoid this by implementing new mechanics and obstacles as you go, instead of being the same throughout. I know you did this but it seems a bit too long until you see a new obstacle/mechanic.
- Some of the sprites (Especially the star sprites) seem to have a white outline. I can't tell if this was intentional but it seems like an error with the cropping.
- Even with the nice animations, the levels do feel a bit empty and dead. You could fix this by adding swaying trees, shrubs, or even small animals to make the game feel more alive.
- Different backgrounds would be a nice change, as the current one (Though I like it) gets boring after a while
I hope my feedback helps you.