This style has a soft place in my heart. It brings back a lot of good feels from the old Nintendo/Atari days.
Right off the bat, I was a bit confused with movement. At first I thought it was going to be like asteroids where all you can do is rotate I had no context that I could move other than the thrust animation. Perhaps a mini map, or some parallax background movement, or maybe allow the ship to move some before the camera pans? That would help alleviate that. Once I realized I could move the game opened up quite a bit.
The UI is crisp and clean. The game comes off very well polished. But without a mini map to or a counter to show my progress/how many enemies were left, I never felt I was getting anywhere.