Infinity Stack

So much new stuff!
-sounds reworked
-material gradients
-particles
-completely reworked game over logic, fixing several bugs
-lowered overall speed by a small percentage
-crazy physics simulation; the stack turns into jello when the game ends
-custom back button
-improved menu animations; start now flies in at you
-android back button now integrated
-antispam mechanisms
-tons of bug fixes
-tons of optimizations