switched to input querying

particles.rb

@@ -26,6 +26,9 @@ class GameWindow < Gosu::Window
 
   # Called every tick by gosu to update object positions
   def update
+    if self.button_down?(Gosu::MsLeft) then
+      @emitter.spawn(self.mouse_x, self.mouse_y)
+    end
     @emitter.update
   end
 
@@ -38,9 +41,6 @@ class GameWindow < Gosu::Window
   # Quit on ESC
   def button_down(id)
     close if id == Gosu::Button::KbEscape
-    if id == Gosu::MsLeft then
-      @emitter.spawn(self.mouse_x, self.mouse_y)
-    end
   end
 
   def needs_cursor?; true; end