Graphics are really nice indeed, including explosions.
You can easily control the spaceship and fire by touching the target or like any other game (the cannon shoots in the same spaceship direction).
I did play just once. Tho I like the graphics I was kind of lost due the lack of a radar or even a clear mission goal. Anyway, meteors and opponents appears in front of you suddenly and (at least me) you don't have too much time to aim them (which is not nice).
What I'm missing:
- be able to lock a target (very important feature IMO)
- have a radar (even if you have a limited area to fly like most of the arcade games)
- a direct mission with a clear goal (destroy 11 meteors, destroy 2 enemies and things like these)
- upgrades and/or power-ups such as shields (after all we're in a space travel/fight so I think the tech guys could handle it).
What I can see is a game with a nice potential that really needs some basic features in order to be more enjoyable.