All of the projectiles have decent variety to them, in size and color. The only thing tipping me off to the location of the player is the ship positioned in the middle of the screen, but I agree with DarkBloodbane. Maybe give both the ship and its projectiles something different so that it stands out to the player; All the other enemies are fine.
Feel free to check my game out, I could use your input: https://wasabiiii.itch.io/grass-elemental-demo-demo
The rest of the game is pretty cool though. Looks fun, good luck with it!