Hey!
Ya know what? This was pretty good! There were a few things which need to be worked on, but then again, this IS your first game. Eitehr way, SOUND! Sound is key in shooting games, people like to hear things explode =P. Which actualyl brings us to the explosions, there were none. You should make the "globes" break apart when you shoot them, ya nkow, so it gives a more 'alive" feel to it, and show the ship taking damage, not just making the globe dissapear. Otherwise, this was fun, just work on those couple of things.