Here's my feedback (:
+ Nice level design, clear tutorial that's teaches you the basics and is also fun to play through. Fun levels that different and gets progressivly harder with new features.
+ polished menu with settings, credits and a button for wishlist! ( maybe move the wishlist away form the title so it sticks out more.)
+ Enjoyed the music and that you had more then one track!
+ The characters walking speed and air controll felt really good
- Controlls, WASD is great but the B&N didn't feel like a natrual placement for my hands, personally I prefer more space between them. Either add re-map in settings or move them to maybe , . or the numberpad
- Movment: The wall clinging often felt "irritating" when accidently sliding down, at the moment it feels to slow for my liking. Then also when jumping into walls especially during the early learning phase, maybe add some delay into the glide so that jumping upwards is more forgiving.
Really nice game keep the good work up!