Getting out of Soren's lab isn't all that easy. A good bit of Minecraft: Story Mode - Episode 3: The Last Place You Look
is not just about getting past the first door Ivor slammed in your way, but also about getting through the mass of monsters that flood the catacombs. It turns out, the base isn't just a place for Soren to study and learn, but it is also a grinder designed to funnel monsters in, kill them and convey the dropped loot to various storage locations. In other words, not only does the group have to navigate a literal killing machine, but a killing machine filled with various monsters. This is no easy feat and you will be putting your recently honed fighting skills to the test in order to get to the other side.
As you push through the fight, you will be faced with several choices, and while these don't feel as monumental as the ones posed in some of Telltale's more adult-centric games, the other characters will still treat you differently. These choices tended to be choosing between two different groups of friends to help in the fight, or choosing if you would go after a lost item or send someone else. As far as I could tell, there don't seem to be any traumatic results to these choices since it seems like there is always someone on hand to help the group that you don't choose, but the choices you make will be referenced in future conversations.