There is camera shake when you crash into the back of the trains... it probably is just not enough to really feel it, but I didn't want to go overboard because some people really dislike it (and I def didn't want to spend time making a setting for it)
I agree, some more effects for speeding up would have been nice, but I didn't have time for that.
And the red flash, it only happens when you don't have enough speed. I was way too late at implementing this, so that is all I could do :P