I love the environment and the colors! The music is so relaxing and it makes you feel immersed in this world. I love the shaders as well!
I would say that the gliding mechanics need some more balancing. I know that it is a hard thing to achieve such mechanics in only 3 weeks so what have you accomplished is very impressive! I had troubled keeping my momentum. I was actually pushing space bar again and again to keep my height. I didn't finish the game because I found it very difficult to target the spheres. It would be better if their colliders were bigger to be more forgiving when you pass close to them. That's my only feedback.
Overall beautiful art and a beautiful concept. Well done!! :)