Hey, first of all, cool idea! Even though the movement was quite floaty (especially with some weird effect that when I was grappling something on the ground I was ending up levitating near the ceiling) - it has a charm to it with feeling less gravity.
I did hear the initial sequence, but must admit that it feels a bit long. Even though the narrative was good, it did take some time before starting the game. Maybe having it play in the backround would be better (as in, you can already move around)
Some polishing could definitely make this game really fun :)