I'm doing a nostalgic tour regarding games and I have came to the horrible realization: I don't know the name of one of the games.

Here is what I remember:
- It is a 3rd person game, a platformer
- It sets on islands and in the demo if you tried to swim to the other islands a shark ate you.
- There were kids on the island's beach and you could destroy their sandcastles.
- It had nice colors, kinda childish like in Sonic or super mario sunshine.
Whoever finds it , will get a reward.

I think I have played it in 1999 - 2000

Found the game! It's "Starshot Space Circus Fever" made in 1998 and now that I remember it , I actually played it around that time.
The first level is on a small island. (which was the demo level as well, that's why I remembered only that place)
No cookies for you but thanks for trying to help!
*oh and closing the thread