Thanks for your review! I agree there isn't much time to find the coin, but I didn't have time to balance properly. You can grab the coin and wait on the roof while the train is at the Bank! You won't be caught this way.
Also that is very funny that the train malfunctioned. 🤣 I never saw that happening while I was working on the game but the code for the train is admittedly a bit thrown together.