What happens

After 320 scores, level 5?

Anyway, 5/5, 10/10 cause I like your name. :D

Fair start...

... it can definitely need a kind of upgrade-system (like: number of rockets on your ship is limited and you have to buy them between levels) with perhaps stronger weapons or better rate of fire.
Then, it wouldn't be too bad if the aliens got stronger from level to level, or perhaps you could add them some different characteristics like speed, health, ability to fire back.
But for some minutes it was quite funny.

If the enemies got stronger...

it might be worth playing, but unfortunately that's not the case.

It was okay

I was entertained, which is always important. I'd recommend working on graphics a bit; gradients don't get you everywhere. Level 5 needs to be fixed; I shot everything that came in, then it was a very long nothing happening. A good start, though; keep working on it.

A nice concept, but...

...it REALLY could use some more work. REALLY. The controls could be better, sprites were borrowed, and when the bad guys died, there was an orange circle. I don't get it.