“Sam Hogan”-esque, I like the visual style a whole lot!
The single jump feels good! But as others mentioned, the double-jump feels off, because either you’re falling (so the double-jump only slows down the descent) or you double-jump right after jumping (so you go really high!)
That is a quick fix; the real meat is the level design and the character charm you added! It put a smile on my face that you took the time to add an intro, tutorial, and dialogue. Great work!