Games Top Down Space Shooter (not the Unity Tutorial): Prototype Stage

For anyone interested in playing, it's up on cheesegames: http://www.cheesegames.net/userinfoowngames.php

It's going to be published to Android, but I want some basic feedback first, before continuing on. The accelerometer is used when playing on the Android and adds more to the experience in my opinion and the user has to tap the screen to fire (unlike most games I've seen where the ship is just firing steadily).
Quick video:

I realize there are a couple bugs, but again, it's in the prototype stage .

 

I like the clear visual contrast of what is deadly and what is not, what is enemy and what is friend.
So many of these shooters are too visually busy and mixed - the players can't tell which is friend and which is foe.
You've done well - contracting the elements.