Crust Combine graham crumbs and butter and press mixture into a 9"x 9" pan. Bake at 350°F for 10 minutes. Remove from oven and let crust cool.
Cheese Filling Soften the cream cheese. Gradually beat in sugar and vanilla until smooth and creamy. Prepare Dream Whip according to package directions and mix into cheese filling. Spread cream cheese filling over cooled crust.
Blueberry Topping Cook berries and sugar over low heat, until berries soften and it takes on a thin jam texture. Stir in custard powder-water mix and cook until jam thickens. Remove from heat and cool before spreading over cream cheese layer. Place cheesecake in the fridge for a few hours to set. Slice and serve.