Small QoL Update

Hey Spankrs! just a small patch I've worked on from watching you guys play the demo!

-Added Restart Level to end screen
-Added background to Booty_Defense
-Added fast forward button in Booty_Defense
-In Small, made spank sounds really big and ponderous/booming
-In Old friend, add Ui pop-up for Shift to speed
-Fixed tree map to not allow clicking next level, just show there's a path
-Changed Old_Friends Spunk to have butt
-Changed Excited level secret hand to stopwatch