Just finished, and I wanted to comment specifically about how much I like the double-jump, haha! Sure, as others have noted, it feels unintuitive initially, but learning how to make it into a forward-propelling jump by facing the opposite direction felt very skillful, and also really unique. (I don't think I've ever seen a double-jump like this before, so it's exciting to see a new twist on the mechanic!)
Of course, it's a difficult platformer (feels especially Kaizo-inspired, to me), so this particular double-jump makes sense here. Admittedly, I like difficult platformers, so I wouldn't fault anyone for bouncing off it. I just wanted to express my appreciation for it here!