I have to disagree, because all the levels are beatable. I've had multiple people playtest and most took around an hour, which to me is one sitting. While i can agree that some levels are annoying and could be designed better, they are still beatable. I know for many that driving in the isometric perspective is difficult, but that is a fundemental part of the game. So to me it just sounds like you have skill issue. That might be a bit harsh to say, but based on the other comments and my playtesters they seemed to have been able to beat the game despite being annoyed.