From your submission info I assume it's one of your first projects and for that it's already really impressive.
Good job also including stuff like options and actually having sound which is not a given in jam games.
I haven't read the other comments so I assume most of this feedback you already got:
- very responsive controls
- text system felt a bit janky
- the game is way too hard
- the player bullets are too similar in color to the ground, but the sound helps a bit
- could use more feedback (i.e. a sound effect or screenflash when getting hurt)