Here is ATwerkingYoshi beating Bloodborne's Cleric Beast using not a controller, but a dance mat.
From a technical standpoint, this is impressive! What's more impressive though is that ATwerkingYoshi is playing the entire game like this. Oh, and says he hasn't ever beaten Bloodborne, even using regular controls, so that this playthrough that he's broadcasting on Twitch will be his first time through it.
The full stream is here. If you want a technical breakdown of how the mat was rigged to control a game like Bloodborne, here's a guide showing the steps involved and the control mapping.