What route did you start with? In the prologue of the game, just after Flynn lashes out at everyone at Yeeyaw, you get options like:
Follow Flynn, sit with Carl, find TJ, follow Leo and Jenna
Those decisions choose your route (Clicking Follow Leo and Jenna gives you another choice between going after Jenna or Leo)
Some routes have 2 endings and others have only 1 set ending. But there are tiny little jumpscares hidden that only come out if you make a certain choice.