Add Hero CellType

level.h

@@ -3,12 +3,13 @@
 
 #include <array>
 
-enum CellType
+enum class CellType
 {
     Water  = '.',
     Ground = '-',
     Charge = '$',
-    Bridge = char(177)
+    Bridge = char(177),
+    Hero   = '@'
 };
 
 using coordinate = unsigned int;