hmmmm...
its your first, but thats fine, it reminds me of an early prototype i did when i was learning the basics of game making with flash. i mean this game deleivers what you'd expect. lots of enemies on screen at once shooting towards you. the artwork was okay. a few explosions would of been nice, missles maybe, its okay that you used kongregates tutorial as a template because you added in some of your own things. and completely redid the artwork.
in fact this makes me want to design and code my own 2d space shooter! :) good job!