I liked the Shiori sprite. Very cute!
The intro cutscene was also very well done!
It's unfortunate you couldn't finish the game.
I also had an issue with the intro cutscene as it didn't fit on my ultrawide monitor (it cropped the top and bottom parts, so I couldn't read the text at the bottom). Running the game in windowed mode helped fix it.
I found it weird that Shiori could shoot to the left when all the enemies come from the right. Maybe you had plans to include enemies that enter the action from behind?
Cute little game.