In a bowl, combine graham cracker crumbs and melted butter until well mixed.
Press the mixture into the bottom of a 9-inch springform pan to form the crust.
In a separate bowl, beat the softened cream cheese until smooth.
Add pumpkin puree, powdered sugar, vanilla extract, and pumpkin spice to the cream cheese, mixing until combined.
In another bowl, whip the heavy cream until stiff peaks form.
Gently fold the whipped cream into the pumpkin mixture until well incorporated.
Pour the pumpkin cheesecake filling over the crust in the springform pan.
Smooth the top with a spatula and cover the pan with plastic wrap.
Refrigerate for at least 4 hours or until set.
Before serving, top with whipped cream and mini chocolate pumpkins for decoration.