Congratulations on a well made game! I was a bit confused at first when I died even though I didn't get hit. When I realised that I increment that counter in the upper right corner for every ship I kill and it decrements for every ship that I let through it quickly became a pretty frantic and fun game. One thing which I would have liked to see is some kind of powerups to my weapons. Perhaps auto-fire, or more bullets or bullets going in a diagonal direction. The music adds to the fast paced game play. Well done!