Added overlay for future fps and stats display

lib/overlay.rb

@@ -0,0 +1,17 @@
+class IMICFPS
+  class Overlay
+    include CommonMethods
+    def initialize
+      @text = CyberarmEngine::Text.new("")
+    end
+
+    def draw
+      Gosu.draw_rect(0, 0, 256, 20, Gosu::Color.rgba(0, 0, 0, 100))
+      Gosu.draw_rect(2, 2, 256 - 4, 20 - 4, Gosu::Color.rgba(100, 100, 100, 100))
+      @text.x = 3
+      @text.y = 3
+      @text.text = "FPS: #{Gosu.fps}"
+      @text.draw
+    end
+  end
+end