The hidden ending didn't work on version 1.0 but does in 1.1. Here's a hint if you want it.
Spoiler on how to get hidden ending
You just need to finish ending 2 and one of 3, 4 or 5, then go the route that leads to ending 2 to see a new choice. If you have played version 1.0, finish ending 2 again to trigger it. (and then go back at the beginning of the last loop of ending 2)
