One thing to consider when playing Bobby’s World is whether all the words in a phrase or description have to have double letters for that thing to pass through, or whether any word in the phrase having double letters is good enough. For example:
Is Cookie Monster allowed in Bobby’s World, even though a Monster isn’t?
My recommendation is to only require one word in the phrase to have double letters. There are other games that share the rule where requiring every word to have double letters makes more sense.