No way, we both made almost the same game of throwing asteroids at an AI controlled ship.
The idea of having a 'heart' that you have to protect was a good one, it's a nice way to add a lose-condition and keep the pressure up. The fact that's it's vaguely heart-shaped is also a nice touch.
Other asteroids being able to hurt your heart felt a bit harsh. A better way to add difficulty might have been just letting the ship shoot more.