Well, I finally did it last night. I broke the 3000 barrier. Just barely - I got 3012 - but it’s enough. I am at peace now. I was using a trusty old 3310 when I did it.
Can anyone beat this? It was on speed level 7, and I filled up the screen completely. I can’t seem to pull off the required hairpin turns on level 8 or higher, although some internet searching throws up references to scores of 4000+, which would have to be done at the highest level, I imagine.