I really like the art style! I don't want to critique too much since you recognized it's not in a playable state. However, if it's not on your radar, I would recommend bringing up the brightness! It happened in our game as well, the brightness in engine was a light higher then it was in browser. Also chunk generation may be low due to being on the browser but maybe you could have some kind of wall or texture to hide the ungenerated chunks when the chunk gen distance is low! Great job and hope you are able to finish it!