I'm afraid the patreon release is not the full game. There are two different releases on there:  a pre-alpha (for the oldest version of peeb back when it was a simple player controller and a route through one level of the castle) and v0.05 (which is like the itch.io release, but it has a ton of better QoL features).

I'd recommend holding off on joining the Patreon if you're solely interested in Peeb, since it's been temporarily shelved while I work on more viable projects in the short term