I agree that stress level increases more and more. I think it would be better to make game become harder with a time, not putting a player instantly into the chaos of 5 different roads. Also while I was writing this review the idea of giving the player possibility to create paths/conveyors himself came into my mind - that's would be awesome. Yes, I understand that with such big addition it would take much more development time so keep my idea for a future development (if there will be such). Nice entry!