You might have run into a bug I found and fixed where the delay accumulates. I think you're right on the light on the rover, so I got rid of it. For sure the whole game could have better models as everything I made is basically just simple shapes.
I think if I borrowed a cam controller I wrote for another game it'd help with orientation (just didn't want to use something I wasn't writing specifically for this jam) I also think upping the camera distance to include the crater sides might also help with orientation, and I'm gonna tone down the sun a bit which might help also. Thanks for the feedback!