I tried to move, but WASD is not working for me. (Edit: I reloaded the game and it is working now. Will play it properly later.) From the comments, others have gotten it to work so maybe I missed a step to activate the game or my browser doesn't like it or something.
A couple people seem to think point-and-click/tap would be a better method than walking. Hard to say since I have not used the controls myself, but I have seem farm games with walking that work. On the other hand, setting it up as point-and-click makes it more usable by mobile users. In the end, I guess it boils down to what you prefer to set up and test play.