Hey, sorry for the late reply but I haven't been keeping up much with this page. There's actually a screwdriver that you have to find in one of the sinks, then use it to open a path through the vent. There's a bit more to the game than just the first area :)
Thank you! That was satisfying to finish a game I was stuck on for almost a year and I wasn't sacrificed this time! (I even tried reuniting the chocolate girl as well as using the vending machines but that didn't make a difference haha)
I hope more games revolving around this universe gets made because so far it seems like an interesting concept. Though it seems pretty vague at the moment, it still has the potential to expand a bit instead of remaining as a one-shot. Either way, nice work on Sacrifice! I can't wait to see what else you make.