Okay, the song is actually catchy. It’s so frantic. I love the title as well. Reimumania? Powerful.
I had fun while playing. For your first game, and game jam, you did a good job. I was able to beat Yukari, but I was sad to see that there was nothing more at the end. Regardless, you have a clear gameplay loop, and having a boss fight is a good achievement as well.
You also have some nice details like Reimu getting sad on low health, her eyes looking at the direction you are aiming at, and Flandre floating around when she defends you. Speaking of which, having her around was cute. Once again good job and keep making games!