Okay I gathered some info and this is what I've got: When I use Mozilla Firefox with various popular extensions it works fine. When I use Internet Explorer the game works but the sword won't swing (It does make a sound though} and the loading is about three times as long. After clearing my cache the same stuff happens.
Im using the newest Flash players and I recently formatet pc.
If you do not have the newest Flash player or you doubt download and install the newest Flash player here: [url=http://get.adobe.com/flashplayer/] If you are using older software of any kind I recommend you to update it because it just might fix this and future problems and updating your system regularly improves your systems stability, safety and speed.