This is a great game!
some feedback:
I love the music, animations and game mechanics!
When I died, I didn't know I died and also would like to see a high score and a death scene with a retry button. However, I noticed that their WAS in fact a death scene, so I think I may have found a bug. I noticed it only when I clicked on options or another part of the menu before hand. Similarly, when clicking on options or credits before opening the game once the game never loaded.
Also 9sven6 mentioned feedback upon hits. Here is a link to camera shake tutorial if you want it. It was definitely missing feedback and I was constantly not knowing that I was about to die.
I would also like to see a border around the game, so I don't get mixed up with the background and the game.
I think the menu scene could use a clean-up and a wee-bit fancier.
This might be and probably will be really hard but I think if you implement it it will make the game more competitive. Maybe you should add a public leader board as this is the type of the game that you are expected to die at.
Another thing that would be pretty cool is a cut seen at the beginning giving some back story to this game. Maybe (idk i'm just imagining) "Welcome fighter. You are the last one alive. It is your duty to protect the land of Ryuzaki!" in a robot voice. You could use - https://lingojam.com/RobotVoiceGenerator
Overall great game and impressive for a jam! Keep it up and keep me posted on updates. Good Job!