Very cool aesthetics and styling. When you describe it as "viciously difficult", you weren't kidding! Have you ever beaten it yourself? I wonder what it would be like if you just doubled the size of all the blocks, but not the car, so that there is more surface to drive on.
Thanks for trying it! I've beaten each level separately but I have NOT beat all of them in sequence recently (like, since enemies were added!) Adding in tile decorators -- fences or cambered edges to the 'hallways' -- was a feature that didn't make the cut but I might add in this week.
The tricky thing to balance with, say, doubling the size of the blocks is that's equivalent to halving the speed of the car. I think improving the controls and adding some affordances like those tile decorators would address some of the needless challenge.