Hi, sorry for the delay!
I actually have no idea how much time is required to finish the current content.
I’ve never managed to do a full playthrough without finding something to fix and spending hours on it ^^
But I guess there should be at least one hour of content? Maybe closer to two?
Concerning the “screen you can’t get out of,” I’m guessing it’s the tutorial at the end?
There should be an option to quit it, which sends you back to a checkpoint to save.
It’s a pretty simple choice menu, so I don’t think there’s a bug I missed there, but please let me know.