I am going to hold a poll on whether or not to do this. Lots of people have told me they don't mind the level layouts being based on driving on the left. But there of course must be people like yourself who do mind.
The only reason I'm hesitant to make left-hand-drive and right-hand-drive variants of every level is that it would result in two separate leaderboards for each level. I can imagine it would be quite annoying opening up a learderboard to see what score your friend got on a level only to see they have a score for a different level.