Oh this was super cute! I found myself trying the flirt option a couple times with each new mechanic just to see what new levels of adorable Ruka and Callie would reach~
All in all some nice light platforming to go with the lighthearted fare! You introduced each new mechanic pretty seamlessly too, with just enough of a push to get players to think of the new possibilities that were opened. "Inflated? Oh, my jump's a bit higher and floatier now, makes sense!"