In a food processor, pulse together flour, butter, sugar, and salt until mixture resembles coarse crumbs. Add water and pulse until a dough forms. Press dough into the bottom of a greased 9-inch springform pan. Sprinkle cinnamon sugar on top of dough.
In a large mixing bowl, beat cream cheese until smooth. Add sugar and cocoa powder and beat until combined. Add eggs, one at a time, beating well after each addition. Gradually add whiskey and beat until well combined.
Pour filling into prepared crust and bake for 45-50 minutes or until center is almost set.
In a medium saucepan, combine peaches, mango, sugar, water, cinnamon, lemon juice, and cornstarch. Cook over medium heat until mixture thickens and fruit is softened, stirring occasionally.
Remove cheesecake from oven and let cool to room temperature. Once cooled, pour topping on top of the cheesecake and refrigerate for at least 2 hours or overnight before serving.