Your enemies doesn't respect personal space at all... They scared me a lot in first play, getting in my face like that and going like "What's up, mate, you mind if we hover right in front of you and shoot you?"
But other than invasion of personal space, I liked it, it's fast and responsive. And I think I even killed 3 bosses, which for me is a great achievement in any bullet hell game. Although, I think bullets could be represented better... Various colors really confused me and those green bullets in green background looked like map decorations until I paid a price to learn the truth... :)