Interestingly, I considered Alice in Wonderland when I was thinking of the theme of this game. For quite a while that was what it was going to be. My issue was that I really like the creative rhymes, jokes, mathematics, and philosophies of Lewis Carroll, and I wouldn't be able to do justice to them. So I went for Snow White instead, but took the shrink/enlarge potions from my thoughts on an Alice game.
BTW, you can use the shrink potion in six places, and the enlarge potion also in six places. So they are used quite a bit. However, in most places the potions are immediately used up, so they are often "single-use". But if you do a replay on New Game+ mode, you can check an option in the Preferences which lets you keep a potion even if the game says it is used up. So you can play around more with them.