It's not always that you can find a game which is hot in themes and graphics, and has good progression. I see a lot of care and effort from the dev, for example not being afraid to rework core mechanics if they turn out fucntional but a bit boring. We are getting lots of content and QOL updates, in summary.
The game offers various character (with physics and reactions!) to add to the piston trap, trying to differentiate them from each other as best as possible, and does a pretty good job at it. You can really see that they enjoy themselves, but I'd like for some recruitable NPCs to have different facial animations to convey different emotions, maybe depending on the actions you take they could be annoyed, bored, angry or embarassed. You can farm materials to craft or buy items that spice up the visuals, but I wouldn't be surprised if in the future more positions could be unlocked (really good concepts would be oral & tit pistoning by flipping the character, adding another customizable piston to work in parallel or in turns with the other one, or even just putting those pretty feet up and making them work: don't think that those detailed toes went unnoticed!).
To conclude, I like the concept, the game space allows for more and more content to be added (which the dev is happy to provide), and beyond all else it's a fun and good-spirited romp.