I assume that you're talking about the fact that the rails will only allow you to travel in one way, which is the direction they were created. Two way rail travel was something we originally intended, but we ran out of time to implement it without risking breaking the game even further.
A lack of time also really hurt some aspects of the game, such as a better tutorial like you said which would've reflected this limitation as well as other bug fixes.
Thank you for the kind comment!