Some thoughts I had while playing:
Neat knot thing in the ball, I wonder if It has any gameplay purpose
Really enjoyable knock sound effect, I wish the ball had a some kind of rolling sound too
Oh, you need to tap jump again in the air to float, not just hold it after a jump
Failed a jump and fell for ages, I could do with faster resets
Seems to have a lot of choppiness in the framerate, I suspect it's all those particle clouds. My PC is old but those clouds seem like a huge performance hog for relatively little effect. It's pretty annoying and I probably shouldn't keep playing.
What you have is fine, and the screenshots look good, I just wish it ran better :(