I agree with Maz that some indicator as to which thrusters are being fired would be good.
Is the acceleration physically accurate? Like, I understand that acceleration due to gravity does change based off distance but at a scale of hundreds of meters, it really should be constant acceleration, no?
I dunno, it was just weird how I had to use the spacebar much more as I got closer to the moon, when I should have been able to do impulses at the same rate as normal.