Boy, that game is a lot :D Let me write it in points!
1. The concept and the title are fun and original, good job!
2. The art is suuuper slick, I liked it a lot, it fits the theme, perfect!
3. The main mechanic is interesting and feels fresh, I had a lot of fun with it!
4. Levels are interesting and well designed.
5. Music and sound effects are great, they perfectly fit the mood, great work!
All right, after all these great things, just two small suggestions :D
6. In-level checkpoints would greatly help, sometimes I felt frustrated when I failed the level because of some random swing at the very end.
7. The first puzzle with swinging already had spikes very close by, I failed it a number of times, maybe the learning curve could be adjusted there.
All in all, this is definitely one of my favorites so far, good job!!!