is there an uncensored verison of the game?
I guess that depends on which version you download. The old 'safe version' is heavily censored to fit the requirements of the jam the game was submitted to at the time, but the most recent upload listed as a demo is currently the most complete version of the game available so far.
There's a lot more content to be added, but if you're referring to the stuff in the current demo like the puffs of smoke covering Castor/ia's modesty and the lack of specifics during the steamy scene, that's just how the game is going to stay, and there won't be a version that removes the censoring for a couple of reasons.
Firstly because there won't really be enough sexual content in the game to really need to, but also because the sprites actually lack detail when it comes to genitals xD Castoria doesn't have any nipples and Castor doesn't have any nipples or man parts, haha. So it would look even weirder if there was nothing covering them x3 This is because the original artist of the sprites only draws the sprites naked without genitalia.