With games featuring youth I'm always a bit worried that there will be nostalgia-pandering, but this game left my worries baseless. It doesn't try to be too cute, it deals with limits seamlessly, and it uses Adventuron's features quite well.
You're a kid who needs to decorate a sandcastle you helped your father build. Which doesn't sound too hard, and it isn't. Your father gives you a map of the beach to start, and you can’t go too far away from your parents. That helps keep the game small, so you don’t have to go wandering off anywhere. Which makes sense. Your parents wouldn't like that. Also, nicely, two of the map squares are inaccessible: some water is reserved for fishing, some for boats. This certainly brought back memories of places I couldn't go on the beach and made them a bit more fun.
The treasures aren’t terribly tricky to find, or valuable, but you would find them at the beach, and you would enjoy them as a kid, an the rainbow text sort of reenforces that--as an adult, I wondered if it was really necessary. It wasn't, but it made the game that much more enjoyable. But the game's not just simply about fun at the beach.
It also touches on things a kid doesn't know and won't realize until later. It winks at the older player. Not too sly for its own good, but a bit of thought fills in some things I might not have recognized when younger.
Once the father built the sandcastle, the kid may not realize parents need and want time to themselves. But there might not always be friends to hang with. So after helping his kid build a sandcastle, the father sends them out on a small fetching expedition to keep him entertained. There's another kid to sort of make friends with and a few older people to help along the way. Which keeps a day out fun for the kid.
Well, for the kid AND for me. And probably you, too. And you don't even have to pack up the car or suffer through traffic to enjoy it.