Goddamn you light blue bullets.
Now, I play Touhou a whole lot, and I can say your game reflects it nicely, except... PUT IN SOME DARK BACKGROUNDS! White+Light blue=near invisible.
I ended up dying at least 10 times solely because I couldn't see the blue bullets. Also with bombs... Yeesh. You could breeze through the game just spamming bombs. Reminds me as though Touhou 10-Mountain of Faith.
Also loved the bit with the "You blow me up? Have a bullet storm" enemies in stage 4. That reminded me of Yuyuko&Satori's stage.
Good game, but a few tweaks could make it even better.