Brother! Why must you destroy what I seek to create? The universe is just born, where did you even find a spaceship?!
The idea is really cool, and the game works wonders! Since every circle is bigger than the last (and more chaotic) difficulty naturally increases the further you run. It makes me think a lot to the no Internet dinosaur minigame, in a good way. ^^
The only thing I would have added: hearts should still spawn even when the life bar is above 3, their frequency inversely proportional to the player's current health level. Because since the laser takes you 3 hearts at once, having 1 or 3 in the bar doesn't really make a difference.
Also, I really the Credits screen, I've never seen it done like this! Great job to the team! =D