Strange, its working here. Are you sure you are clicking into the viewport (let the game capture your mouse?)
Yes, I was able to look around, but not move. I just tried again, and it worked for about two seconds, until the screen went (and stayed) black. This Wasm thing kinda sucks, I guess.
Edit: Tried again and I was able to play this time. Very disappointed I couldn't smash the computer with the hammer. :D