Hey!
Thanks for taking the time to play our game and give us feedback. I agree with everything you mentioned. We wanted to question the idea of a jump button when it's not really needed when you can "fly", so that it'd reduce the scope of the animations to make and use the button for something else. But it's true that we are so used to have a jump in platformer that... it feels strange.
I must admit we spent more time playing with a controller than a keyboard and the layout needs some love.
Glad you enjoyed the art and design 🙂