This movie makes so little sense it pains me.
The movie makes no sense AT ALL.
1- How would actions in the bunker look like in the classroom? Do the students just say what they're doing? If so, it makes it impossible for someone to keep an action secret, like when the gay blonde kid was hiding from the professor when he held a gun to the girl who didn't want to sleep with everyone; Did he just say "now I come out and lunge at Mr. Zimit"? That would make it so any student can change what's happening to whatever they want, which again, makes no sense.
2- How come the gay farmer (or now florist) is no longer gay in the third "round"?
3- Why did they "reveal" to us that the blonde girl was going out to the professor in the end? Did they feel like they had to add a "twist"? Because it added NOTHING to the plot; I couldn't care less. Also what happened to the professor with the gun? We just heard a shot, and that's it. Are we supposed to be left intrigued? Because we (or at least me) are not, since the professors personal story is so irrelevant.
4- Why were they so worried about the code to exit when they had an entire year to guess it? They could have just typed in 00000, then 00001, then 00002, then 00003, and so on. They probably could have gotten the code in just a day or two at the most.
5- These people are too white to be Indonesian.
TL;DR: This movie is terrible and inconsistent. For your own sake, do NOT watch.