Cheers I got it working, for some reasons none of the keys worked until I changed browser tabs and then came back. Tried clicking on the game window to give it focus but nothing else seemed to work.
Yes, this is known bug. Usually could be fixed by holding a or d before playing the game. It needs to be something related to emscripten and I still didn't find out what causes it. This doesn't happen in desktop version. Thanks for the feedback.
