Game's Nice, Lacks Info.
It seemed like there was no choice but to shoot the white ships unless you wanted them to kill you. For people who prefer using a certain secondary weapon, that's no good at all.
A lot of these games I see fail to put it some kind of pause button, which would also be convenient, but I won't complain much about not having one.
Putting the instructions on the page rather than in the game, or having a tutorial option would also be good to add in the future.
All that aside, I like it. Fun and challenging.