This was excellent (I got the gold! yay), though I also think that introducing WSAD moving was pointless. And yeah, with this concept You already have many more mechanical possibilities to expand this provided by other.
I maybe will suggest this as a mobile game. Touch controls are obviously mostly out of the way You can't move player's finger... But maybe motion controlls would work? Or maybe You can scrap this cursor stealing mechanic to make something different?
Really fun game, I like it, would like more of it.