Excellent game, really well done and scalable (many different level ideas popping in my head!)
The mechanics are super well done, loved the grapple hook which felt fun and yet difficult to master to land accurately. Also, the voice recordings are so much fun, the dialogs, the art style, the fun options menu (lol paused but not really).
Kudos for adding more difficult levels over time, making the entire run through very pleasant and learning over time, facing more difficult paths and trying different approaches to win. The animations also add a nice little something (bouncing mushrooms, save points, door openings 'cutscenes' and many other small details that enrich the overall experience.
Had a tiny bug where the audio settings couldn't be interacted with but other than that, a really fun game;. Fantastic job!