nice idea! i really liked i the first moments but after the billionth evasion in the depths of space (normally after max 5 to 10 seconds) i felt ready to jump in a black hole myself as the controls are way too difficult for me, who i usually am quite impatient and fastly frustrated towards what is entertainment and culture if it makes me struggle too much for no reason (even if here for respect of each creator's work i really try more and longer than usual) ... why should anyone choose a game where progress is that hard?
maybe if you tune your gravity and directional functions and give it somehow a 'relief', maybe simulating something like gravity and matter of other pysical objects (asteroids, rocks, whatever ...) orbiting around the black hole that you could use for temporary escape?