Hi! I'm glad that you've enjoyed the game. Regarding the bugs, I appreciate the report and those are already fixed in more recent versions.
Regarding the versions, currently the game is under active development so there's no real "full" version yet.
The difference is that here on itch there is an outdated free version, and by supporting me on patreon for at least $2 you get access to the current more updated version that I keep releasing as a go along the development.
The main difference thus is that the newer versions have new stages, enemies and therefore new erotic scenes for each of those, but in terms of overall gameplay it is more or less the same.