Sure thing! essentially the other gameplay you've seen is from various "Builds" the developer has released for patreon supporters to test newly implemented mechanics or characters. like pilot episodes and behind-the-scenes stuff, for a comparison. if you want to try these things for yourself, I suggest supporting the dev if you can. There's plenty of other neat rewards for those that do, and that aside every penny helps. pretty sure I even remember there being talk of hiring voice actors if there was a certain donation quota met, an the fans have already blasted it out of the water!
Anyway, if you want more info check the other page for the game, it'll tell you all you need to know.