I agree about the controls.
I can see where you were going with it. You activate one beam to push the ship one way, and activate the other to push to back that way.
The problem is that it takes getting used to. I think a control scheme where pressing D always made the ship turn right, and A always made the ship turn left (and this was true regardless of where you are facing) may be more natural.
I also ended up going in circles more often that I'd like. What is disorienting is that the controls sort of switch based on direction. Fly straight down and you can turn right with D, but fly straight up and you go left. With the ship constantly changing direction, it's hard to keep up with what direction the buttons will make it go. I have to keep a very close eye on where the beams are.
If I keep in mind that A always makes the ship rotate clockwise, and D makes the ship rotate counter-clockwise, then it makes more sense, but it is still a bit disorienting.
Anyway, it's just a suggestion. I think good controls can make a game more fun to play, so there's no reason not to fine tune it a bit as you go.