I havent encountered any viewport related bugs till now so Im not sure about that, Id appreciate if u could elaborate a bit more on that
But on how to beat the level. The level end is on the left side, so you gotta take the train to the direction changer rail (on the right) and then carry it back to the level end on the bottom left.
Tbh its not the very intuitive to look for the level end part, I definitely should make it more obvious as to where the level end is located.
Your feedback is greatly appreciated :)