addstr is more generic

ruby/myhunt-curses.rb

@@ -26,13 +26,13 @@ def display_curses( field, state = { dead: false, victory: false } )
     Curses.setpos y + 2, 0
     field.width.times do |x|
       if [field.explorer_x, field.explorer_y] == [x, y]
-        Curses.addch 'o'
+        Curses.addstr 'O'
       elsif [field.width, field.height] == [x + 1, y + 1]
-        Curses.addch '_'
-      elsif field.field[[x, y]].open
-        Curses.addch field.field[[x, y]].mine ? '*' : ' '
+        Curses.addstr '^'
+      elsif field.field[[x, y]].open || state[:dead] || state[:victory]
+        Curses.addstr field.field[[x, y]].mine ? '*' : ' '
       else
-        Curses.addch 'H'
+        Curses.addstr '-'
       end
     end
   end