This is a neat little bullet hell game.
I like the concept of being able to choose which type of attack to use rather than using whatever the latest powerup is. I even started to get used to the idea of using the scroll wheel to choose the direction of my attacks.
One recommendation I have for the tutorial would be to break it up into smaller sections. More along the lines of "here's a concept - now you try doing it" instead of "here's all of the controls, now try it for a minute before we go to the main game." It will make it easier for players to understand what all of the terms mean and how they relate to each other.
The text needs some proofreading too, but it's not incomprehensible or misleading.
Are there sound effects for the shots and enemy deaths? I didn't hear anything for either. The music is nice. The visual novel-styled busts look good, as does the overall look of the game. The UI for the gauges seems a bit too fancy, though; the bars, the stuff that matters, seem to get a little lost in the busyness of the borders.
The game seems to be off to a good start and with just a little bit of refinement I think it can be an awesome, unique experience.