This is the most unique game I've played in this game jam! It looks rather superficial at first, but it's actually got very deep mechanics underneath: juggling your rounds for lots of explosive damage, teleporting to an enemy to evade an attack, bullet jumping and dashing to reach all kinds of spots... The game really gives you freedom to do many interesting things! And it's quite hard, too! You really need to use these mechanics to the fullest to beat the game. I especially enjoyed the bosses' bullet patterns, they were challenging but didn't overstay their welcome. The map was somewhat confusing at first, but I figured out where I needed to go thanks to the blue beams of the crystals. A minimap could have been handy to understand where I needed to go.
The visuals are ok, it would have been nice to have some sort of animation for Reimu since she just looks like she's sliding whenever she's moving forward, but I can see how that would have been cumbersome to implement in such a short amount of time. The pixel art for Reimu, Aya, and Marisa was cute, I recognised them instantly!
I liked the music. I didn't expect drum 'n' bass and it felt strange at first, but it's actually kind of refreshing! It could have used a bit more variety, but again, I'm sure you had to focus on more important elements.
The story is pretty good! It's such a shame that you didn't have time to finish it all! I would have liked to see those missing scenes.
Overall, I enjoyed your game! It was challenging, not too short, and very interesting. Considering it was made by only one person in two weeks, I'd say it's impressive!