The only one I have that’s “happy” - at least superficially - is Funhouse.
But even that one can be quite dark, both from the creepiness of Rudy just to begin with, as well as according to one version of the game’s story that claims what’s really going on is that Rudy is actually imprisoning kids in the basement after he lures into the funhouse. Gives new meaning to many of the call outs and makes it feel like you’re on a mission to rescue them while not arousing Rudy’s suspicions of your motive for being there.
Otherwise, the rest of my games are quite squarely in the dark category: T2, TZ, BK2K, and BKSOR.
I play and enjoy happy games like Willy Wonka a lot on location, at shows, etc. but since I don’t have kids or any kids that come with their parents when I host a pin party, I’m perpetually keeping the “cave” in “man cave” with my games.