Oh... should've really checked whether the restart works or not, I added it the last second (I intended the players refreshing the page to replay lol), thanks for pointing that out and playing the game, and even replaying!!
As for a tutorial, something alike was planned but I HAD to cut it out from the release cuz deadline was due. Anyway, I will try my best to make the initial player adaption to controls as easy as possible, again thanks for the feedack!