WorldMap Limits like Cuphead

Hello!!! I am creating a game, where to enter a level you are on a world map.

The point is that I would like to know how I can make the limits of the map so that the character does not leave the island and does not pass through the water, as in Cuphead.

Thank you!!!

(Sorry for my English)

You can put an invisible tilemap with just one tile type and Solid behavior. Set tiles where your water is on the map and your character will not be able to move there.

thank you very much!!!