Are you thinking it needs a little more acceleration speed so you can react more quickly?
To me, the ship felt a bit slow to maneuver overall: it takes about 3 seconds to move across the width of the screen. So I think it’s not just about acceleration – I’d probably try raising the velocity cap as well.
It also surprised me that there was so much momentum after letting go of a movement key, especially vertically. This is why I’d also try decelerating a bit more sharply when the player lets go of the throttle.
All of this is just my opinion though – take it with a pinch of salt and see what other playtesters are telling you so you know what to improve upon :)