Hey, cool game you have here!
The graphics are beautiful and the sfx are great, maybe there could be use some high-action music in the background. The mechanics are a bit basic but they are effective, like I found that the bomb was very useful when I was in a pinch.
From the enemy layout and the obstacles in the way, it seems like the controls require a more precise way of moving than they already are. When I move the mouse, the camera turns and so does the ship when I press directional keys, so it gets a little disorienting and it's hard to aim at enemies (I often have to stop moving entirely to hit them), but maybe that's just me.
The pearls are a good design choice, because it doesn't require you to kill all the enemies to progress, like most shooting games.
Good work!