I have some suggestions for the game
First, you can do the workouts without clothes to "strengthen the momentum"
Second, we can choose and buy new clothes for Fionna, the smaller the clothes are for "agility"
Third, being able to repeat favors with the ice queen.
Fourth , being able to alter Fionna's body, be it putting pubic hair on her pussy, giving her tattoos or writing on her butt, things like that to make her more submissive to corruption.
I am a big fan of your games and I would like to see at least one of my suggestions in the game. Regards and good luck in your future work