Incest and bestiality content are not in the main game due to patreon rules. Install the Spicy (incest) and Gnomes (bestiality) mods to add those back in. These are safe to add. Other mods, and directly editing game files, have a strong risk of borking the game and are not recommended.
There are two big cheats built into the game. Freddy's Corpse gives cash and potions, and has an item which makes the MC seriously overpowered if you equip it. Pink Mushroom disables Affection loss for all girls except one (who has repeatable quests depending on her Affection hitting rock bottom). Another, minor cheat is only usable for your dungeon "pet" if you add her. Let us know if you want more info on the cheats.
There is a discord for the game if you like (some people choose to not do discords), which is remarkably friendly and helpful. The dev does participate on it occasionally, mostly when people report bugs but sometimes for other things. It has a supporters-only section as well.
There's a walkthrough. The first part is fan-made up to about v1.61, and then mini-walkthroughs by the dev for content from the updates. Parts are outdated and/or incorrect due to changes in the game along the way but it's still quite useful. Someone on the discord is supposedly working on a new walkthrough.
EDIT: The earliest images and animations you encounter are (usually) the first ones the dev did, and have the lowest quality. He's gotten significantly better which can be seen in later images/animations. He's gradually updating the early stuff...v3.55 updated one of the earliest image-only scenes to current quality and added animation to it.
