Please note that the game is much smoother on standalone executable download rather than web version, however, you cannot play in custom MONA worlds in the executable version due to mona SDK restriction.
Also note that TempleTussle, BazaarBash, and CemeteryClash gameplay quality (performance) is low in webGL and thus currently disabled.
Also note that on custom MONA world loading, it may take a few seconds for the world to populate. (You may see blank screen for ~30 seconds)