I got to level 7 or 8.
Tips:
You get a boost to your shields (Energy) at the beginning of each level. Once you have reached the required score for the level (bottom left corner of display) concentrate on avoiding asteroids using the radar on the right side.
Yeppers on the continuous fire by holding down spacebar. This is especially good for folks (who shall remain nameless) trying the game out at work.
On level 3, start by going straight up to get to station #2, the others are in corners and easier to find. Doesn't matter what order you hit them in.
More tidbits as I discover them.