Many simulators include a progression system . The more you feed her, the larger she grows. This creates a feedback loop: As she gets bigger, her hunger increases exponentially (square-cube law applied to fantasy). A single strawberry might satisfy her at level 1, but at level 10, she requires an entire orchard. Some games incorporate "reverse scaling," where the player shrinks further with each feeding, increasing the sense of vulnerability.
Systems that allow players to grab the giantess's tongue or uvula to avoid being fully digested. Community and Availability giantess feeding simulator