In a bowl, combine graham cracker crumbs and sugar. Stir in melted butter until combined. Firmly press mixture into a 9-in. springform pan, covering the bottom in an even layer and 1/2-in. up the sides; set aside.
In a large bowl, beat the cream cheese on medium speed until fluffy, 2-3 minutes. Add pumpkin puree; beat another 2-3 minutes until fluffy. Beat in confectioners' sugar, instant pudding, pumpkin pie spice, vanilla and salt until smooth, 1-2 minutes. Fold in whipped topping until incorporated. Spread pumpkin filling into the graham cracker crust. Cover; refrigerate at least 6 hours or overnight.
Top with additional whipped topping; dust with cinnamon. ENJOY!!