I loved the aesthetic you got here, both in visuals and music. At the beginning I didn't understand the objective, but did so in the second run. I like the way you took the concept of out of control and put it on the environment.
Feedback: As pointed out by Kovax, then the cart ran away through the floor of the train and disappeared, then music stopped. Also the train was going upside down at some point and the character as well as the cart were going outside of the train.