I enjoyed it a bit, though it was a bit frustrating. The thing that really threw me off was that pressing up didn't keep the same turn radius! Holding up made the bullet go forward faster AND turn faster, this made turning way more difficult. Intuitively, up + left should mean turn left while going forward, and not speed up (while also turning left the same). If the speed-up button was not on UP this would be less of an issue.
I prefer difficulty that comes from level design rather than controls