I like it! However, a limitless reward for shooting boulders is a very problematic design decision because it incentivizes an intrinsically boring task. Also,

I like it! However, a limitless reward for shooting boulders is a very problematic design decision because it incentivizes an intrinsically boring task. Also, the amount of randomness is remarkably high for a genre defined by the relentless yet predictable march of the enemy ships.