There is a lot of money to be found in the locations, you need to explore them. A "?" appears above your head. - it means you found something. There are no deadlocks in the game. In your case, go to the beach and look to the left of the cactus and in the snack bar in front of the postcard stand next to the door.
In the next update (0.05), the entire game system has been redone and everything has been greatly improved, from graphics to gameplay. And this point has also been taken into account.