It looks great, and the intro is absolutely wonderful ^^
I like 2.5 d shmups too!
Gameplay wise, it felt very 'euroshmup', basic ennemies are very bullet spongy, instead of popcorn ;)
Also, there are ennemies that sweep with bullets back and forth from left to right, that are impossible to navigate through; you end up on the side of the screen and doing left rights just to progressively make damage, it doesn't feel very danmaku?
Euroshmup could be a choice.