I think my high score was like 200, nice work! I like the visuals, the font is perfect.
At some point there were too many things on screen and my frame rate dropped and I lost. I experienced a weird bug where the spaceship started to fall below the screen and I was thinking about it later. Is there something like the velocity of the spaceship, its surroundings, or the camera that would depend on the frame rate? You should look into it and make sure to multiply that value by delta, the time since the last frame.