scenes/battlesystem: get inputs from right source

sonic-radiance.love/scenes/battlesystem/controller/cursor.lua

@@ -101,7 +101,7 @@ function Cursor:update(dt)
    if (self.frame >= 4) then
      self.frame = 1
    end
-   local keys = game.input.keys
+   local keys = self.controller.keys
 
    if (keys["up"].isPressed) then
      dy     = math.max(self.y - 1, 1)

sonic-radiance.love/scenes/battlesystem/controller/menu.lua

@@ -50,7 +50,7 @@ end
 
 function MenuSystem:update(dt)
   if (self.isActive) then
-    local keys = game.input.keys
+    local keys = self.controller.keys
 
     if self.cursor < self.view then
       self.view = self.cursor

sonic-radiance.love/scenes/battlesystem/entities/character.lua

@@ -74,7 +74,7 @@ function Character:update(dt)
     end
 
   elseif (self.currentAction == "selectAttack") then
-    if (game.input.keys["B"].isPressed) then
+    if (self.controller.keys["B"].isPressed) then
       --self.currentAction = "selectDirection"
       --self.controller.cursor:set(self.x, self.y)
     end