Shows some great promise, but my ship won't move left or right :( keep up the good work.

I can move left and right on linux. I can also shoot. I noticed a few bugs, like after you blow up an alien you can still shoot at where it's going. So when the aliens move straight down the screen you can kill it up to 3 times, racking up points before it actually is removed from the playing field (even though it's hidden). Joseph Elwell.