Mario: enable death from bounce for Goomba

mario/visitors/goomba_visitor.hpp

@@ -51,6 +51,9 @@ public:
     double getValidXPos() const {
         return validXPos;
     }
+    bool shouldBounce() {
+        return bounce;
+    }
 
 private:
     bool onGround = false;
@@ -58,6 +61,7 @@ private:
     uint64_t _type{};
     bool death = false;
     bool instant_death = false;
+    bool bounce = false;
     uint64_t from = -1;
     bool left = false;
     bool right = false;