Great game, but...
I love this game. Haven't put it down from the moment I downloaded it. But key details are omitted from the how-to, such as the tickets awarded for solving each puzzle and what criteria the game uses to determine those awards. I just ignored them until I discovered that I don't have enough gold tickets to advance to chapter 6. Grrr. Also, spoiler alert: the game clearly explains how the Stations work when they are introduced. Yet when you reach Ch 5, level 19, one station suddenly works differently with no explanation whatsoever! WTH?