Stranger's forum on Steam is almost entirely full of threads with people complaining about the game being broken, so I assume they're going out of their way to make sure the same doesn't happen with N'n'T...
They said here that they're "not quite finished with ensuring the game is fully optimised for all hardware, and have at least a couple of months left before release." And that was a couple of months ago, so I hope that they'll at least have some news about it soon.