Wow this is great for a first game :O Here are the things you can improve :
- Sound effects for getting hit, picking items etc.
- When getting hit give the player a visual response like flickering the player or changing their color.
- Spacebar for movement is a bit awkward maybe use mouse left or make the ship always move?
- The camera is a bit clunky if you put your mouse in center of the player camera spins like a beyblade maybe :D maybe you can use the cinemachine camera.
Overall i liked this game i hope you work on this after the jam would like to see how it will evolve :]
Nice work !