Take biscuits in a blender and powder coarse. Take it in a bowl. Add melted butter and mix well. Spoon this into the springform pan and spread evenly. Chill in fridge for 15 mins.
Make blueberry sauce. Take blueberries in a sauce pan, add sugar and heat till it comes to a bubble. Mix cornflour with water and add into the blueberry mix. and cook till thickens. Set aside to cool.
Now take cream cheese in a bowl and whip till creamy.
Add in icing sugar and mix well
Whip cream in a separate bowl till stiff. Spoon this into the cream cheese and fold gently.
Spoon little blueberry sauce into the cream cheese and fold gently.
Spoon this over the biscuit and top with blueberry sauce.