Great game! Nice mechanics, and good interpretation of the theme. I loved the momentum aspect - swinging round and round to build speed and flinging myself upwards was a very enjoyable experience. I felt the vertical boost on the wall was not particularly necessary, and I think it'd be really fun to design a whole game around the two simple abilities of a grapple, and a charged dash. I did find myself lost on some of the bigger jumps - some more leading level layouts would help with this - maybe more alternative paths. A wider camera, especially when moving fast, could also be a good idea. Overall, fun mechanics with lots of potential.