The noise you mention is indeed supposed to be the walk sound. It could definitely be adjusted.
I can understand the concerns with the camera. To be honest, someone else designed level 00 and I don't think he had the camera in mind when he was making it. I did the best I could to make adjustments to it. The other levels were all designed by me though.
Enemy interaction is something a lot of people have been having issues understanding. I think half the reason is because the tutorial doesn't do a good enough job of explaining certain things to players, so I will definitely be overhauling the tutorial.
As for enemy bumping, I'm not sure how you handled it but you aren't meant to approach them aggressively if you do not have blast attack ready. It's ideal to dodge them first, they will glide past you and if near an edge you will have a window of opportunity to bump them of right before they try to turn and chase after you again.
The bump strength is supposed to be the same throughout all levels although I think the angle you bump each other at affects the trajectory. In level 02 particularly, I feel as if in that first section with the four capsule-bots they knock you further than usual and I can't figure out why this occurs.
I agree that the blast attack mechanic is not explained well, this is because the tutorial lines were written before the mechanic was finalized and should have been updated. I disagree with the blast attack not being useful. It bumps off enemies pretty effectively. I think this could be the timing of your activation. The range of the blast attack is actually pretty far, its hitbox is slightly larger than the visual effect. Try to make sure you have some space between you and the capsule-bot upon activation to make the most of the range.
Thanks for the compliments on the music and aesthetics. I'm also always glad to see a NOVABREAKER mention! :D Saying you can see this being a game you purchase is a big compliment. Right now, this isn't planned to be a commercial product. We'll see though. Thanks for playing and writing a review!