Grease an 8-9 inch spring form pan. Mix cake according to package instructions. For deeper strawberry flavor substitute strawberry juice for water (optional.) Add package of strawberry Jell-O to mixture. Mash one cup of fresh strawberries and one tablespoon of sugar in a zip lock bag with rolling pin or use a mini blender. Add mashed strawberries to cake batter and blend well to combine. Pour into greased spring form pan and bake according to package instructions. Let cool. Freeze cake for one hour for easier slicing and frosting. Slice cake in two layers. Frost the layers of cake with butter cream or white icing and then frost the entire cake. Top cake with remainder of fresh strawberries, and add fresh fruit of your choice. Mound the Snickers chunks in the middle of the cake.