The game is about an hour to an hour in a half long! There are other endings too but if you want to get them you can start from a save point though to save time (getting a few more endings, if you wanted, should only take 30 minutes). :)
Oh nice. I am currently playing a super long game, so I want to keep all other games short but roughly 90 minutes fit a nice 2-episode slot. Thanks for the speedy feedback!