Timber`s island is the main hub world for the adventure mode.
There are 4 big doors which lead to the 4 worlds.
To get to Dino Domain (World 1) you must have 1 balloon.
To get to Snowflake Mountain (World 2) you must have 2 balloons.
To get to Sherbet island (World 3) you must have 10 balloons.
To get to Dragon forest (World 4) you must have 17 balloons.
To get to the secret world (Future Fun Land) you must have beaten Wizpig and won every Trophy Race