Is there any way to disable your premium upgrades? I'd like to try a self-imposed challenge but I don't want to use a different login or site (it would remove my career rank and thus most of the towers).
Okay, so hitting no obstacles is not impossible, but requiring a lot of luck to get the road clear enough to navigate without running out of time. I don't like luck-based challenges. And my comment about the overly-large hit box for hitting cones still stands.
Would be nice to know what exactly's terrible about it - to be able to improve it.