Noticed there was a new version (1.07), but not sure what the differences are (don't know where patch notes or whatever are to be found). In any event, I tried out the new version and managed to crack 2k points for the first time ever (11 out of 16 perfect deliveries).
Pro tip for players: manually switching between day and night (bound to Backspace and Enter by default) is key to getting a really big score. Day mode is easier to orient yourself where you are (easier to tell the difference between land and sea), whereas Night mode shows you exact city locations (the blobs of light), allowing for more consistent "perfect" deliveries.