Hello.
I played a bit of this game and have some feedback for you.
Firstly, your main menu is very messy. It's hard to properly click on what you actually want. This also applies to the settings menu.
Secondly, the fact that there is an "Exit" button on the game scene is very annoying. If I want to quit, just let me have a button to do so. UI on the game scene could also be on the top.
Thirdly, I feel like the camera should follow the player, as taking damage off-screen feels cheap/unfair.
Furthermore, the effect of when you kill an enemy is too big and makes it hard to see other enemies.
Lastly, a way to show my score on the last run, or even a high score system, would be very nice.
I wish I could show you my high score to prove that I played, but as I mentioned, I cannot.
Congrats on finishing your first game jam. Don't take this feedback as if I hated you or something like that, just trying to help.