The Wonderland Board

Mystery Island
I am try again so many times , but do not how to go ? Can help me ...

Here you go

[label the 3 teleports on each island as UP LEFT and DOWN, based on where each is located on the island]
1) From start island, go through this sequence of teleports: UP UP DOWN LEFT DOWN DOWN.
2) Grab the white key you see.
3) From the island with the key, enter any teleport; they all bring you back to starting island.
4) Back on staring island, go through this sequence of teleports: UP UP DOWN LEFT LEFT.
5) Use the key on the gate left of the star.
6) Grab the star.

This is a map of the entire "archipelago", drawn by Emerald141.