I can maybe try to add a toggle for some of that stuff down the line. I do need to work on adding more preds and levels first because I spent a long time working on accessibility/preference toggles for a couple months and honestly need a break from that, haha.
The customized game option lets you start as a pred character. Pred mechanics will also be expanded on in the future. This will include being able to grab enemies and swallow them before defeating them, and of course being able to eat regular enemies. The implementation of predding in the demo is more of a teaser of what's to come in the future than anything. Keep in mind, the demo is just that; An early preview of what to expect in the full game.