Thanks so much for trying it out and taking the time to share your impressions!
I did experiment with the ability to look down, but it looked somewhat jarring. I'll look into this again for the post-jam edition.
Coyote time actually is implemented. Perhaps it needs to be a bit longer; we'll see what the majority of players say.
I did try implementing a dynamic jump height, but I just wasn't pleased with the result.
Dash is just Left Shift. It should give you a strong propulsive force in the direction you're facing. Most useful when you've already jumped in the air. Of course, you have to unlock it first.