Nice start
Why hello there, nice to see you finally started doing flash.
I'll be critical...
Graphics leave me wanting a lot more, I liked the menu's background. The "deflector" was a bit simple, and very... weird too. The ships could be much better, and please lay off the use of flash's preset gradients.
Sounds were a bit annoying, the menu music was nice. The in-game music not so much, and sometimes it stopped playing. The sound fx were a bit annoying.
As for interactivity, the game goes quite random and boring. Perhaps varying speeds (not just according to difficulty mode), make something you're actually defending and the ships crash on it and damage it, and vary the damage depending on the ships color, i dont know.
Make it more interesting, it's a simple pong game without an actual enemy.
Gotta agree though, It's nice when sound plays exactly when you meant it to lay. :)
Making the ships bounce off in random directios or in a direction that was according to the reflector's angle would've been very nice too.
Overall, nice. But could be better.
Keep it up, cheers.