I’ve had this game idea for a while because I’m obsessed with Alice in Wonderland. The main character is a girl who starts out having a totally normal day. She’s with her mom, talking about vacation plans, and everything feels ordinary. But right from the first choice, your decisions matter. You choose her favorite breakfast, and that choice is remembered later in the game when she gets a dress that gives her special powers inspired by that breakfast.
The game continues with a normal day where you pick which friend you want to hang out with, and you get to spend some time in the normal human world, too. Later that night, her mom reads her a story before bed. When she wakes up, everything has changed. She finds herself in the house of a human sized mouse family.
Now she’s in a town full of animals that walk on two legs and live like humans. But lately, some of the residents have been disappearing, and she sets out to uncover the mystery through adventures and quests with the new friends she meets in town.
This looks like a good start. It might be helpful to include a bit more setup here, since at this point in the story we don’t really know anything about the different friends, so it’s not clear what the different choices might lead to.