So what's different between the regular version you can find on Itch, and the "premium" version?
When I played the free version on Itch, I couldn't equip the alternate outfits from the merchant, and when I went to rebuy them using the infinite coins from the multiple chests strewn about, it would always say "You already own this outfit!"
The only combat and "adventure" stuff is the Insectomorph stuff in the jail, unless of course you (very easily) clip out of bounds and wander around the outside of the map before falling off and respawning on the main floor.
Like, all there is for us here is a bit of wandering around the temple to hunt for sex scenes... which in itself is redundant since when you start any scene, a scene selector pops up letting you choose from every sex event in the game. (And also, for some stupid reason, the scroll wheel during sex scenes is used for both adjusting the action speed and the camera zoom, so that needs to be fixed.)
So again: free vs premium. What's different?