This is fantastic. I like the expansion of "hookshot" like mechanics into the main idea of a game. I especially love all the different environment types that come into play like the ice and conveyor belts. If this concept was expanded upon, I'd love to see the two characters have different properties so there's an aspect of wanting to choose which one you launch to specific platforms depending on the circumstance. And this is more of a personal preference, but I'd prefer being able to aim where I'm launching and have more of the challenge come from timing things based on moving elements in the environment and puzzle solving where I should launch to and how/when. There's a lot of potential here, excellent work!