I got some serious Hollow Knight pogo vibes from this game lol.
This idea is genius. I love how you incorporated the "There and Back" and "Collectibles" theme into the actual gameplay itself. The gameplay is challenging but super rewarding once you beat each level, and it's highly addictive as well. I do think the swinging hitboxes should be a little bigger though - maybe have them cover more of the player's body. Other than that though, this is a fantastic game!