I do see the Ender's Game coincidence, but it is much more obviously, intentionally, explicitly referencing Dr. Strangelove and The Last Starfighter. If you've seen those movies (which I thought everyone had), it's much funnier.
The laser does seem to be at too great an altitude to make sound, but that's not the real problem. Last time I checked, light travelling did not make a sound, radioactive amplification or no.
Personally, I love this one. Sound effect included.