It’s a fun and somewhat challenging game to begin with, then the ads become relentless. And the levels repetitive. And the quest for new trains is useless, because new trains only look different, but add no new functionality, like slowing down the growth of passengers cars, or increasing capacity, or anything except change the appearance of the trains. And when you get to the chest level, 9 chests are presented, and your goal is to find the chest with the new (useless) train. You get three tries at a time, and have to watch an ad (of course) in order to get 3 more tries. Here’s the rub, the train ALWAYS appears in the last 3 chests, forcing you to watch 2 full ads (no ad skip feature here). I’ve played over 100 levels, and it’s statistically IMPOSSIBLE for a “randomly” generated train to ALWAYS appear as the first chest in the last set of 3. Impossible. So the chests aren’t random, the game is repetitive, ad ladened and ultimately boring. Don’t waste your time.