More work on porting to crystal-lang, stubbed a few files

examples/window.cr

@@ -1,6 +1,21 @@
 require "./../src/cyberarm_engine"
 
 class Window < CyberarmEngine::Window
+  class State < CyberarmEngine::GameState
+    @options : Int32
+
+    def draw
+      Gosu.draw_rect(0, 0, window.width, window.height, 0xff_353535)
+    end
+
+    def needs_cursor?
+      true
+    end
+  end
+
+  def setup
+    push_state(State.new(3))
+  end
 end
 
-Window.new(width: 700, height: 700).show
+Window.new.show