The game looks beautiful. Congrats!
In terms of visuals I would suggest removing the small noise from the wall when the are further away, most of the times I though they were stars in the sky. maybe populate the sky with such starts. I don't think this affects the gameplay that much though ;)
Sometime the progression can be a bit too challenging, particularly in the first platforms. I'd suggestion easing a bit the learning curve in the first couple minutes of gameplay.
The sound effects are on point!
Everything works together very nicely and the feels very coherent even after 20 minutes.
Great job!