Table 5.

Mobile game design guides on cognitive and physical elements.

Design guide (DG)				Previous works
Audiovisual
	DG1	Design important object/character as distinguishable from others.	[20,22,36,62]
	DG2	Provide voice dubbing when presenting stories or speech bubble.	[24]
	DG3	Provide options to choose the size of the font and objects.	[20,22,24,25,36]
	DG4	Avoid sounds that are too sharp or repetitive.	—a
Interface
	DG5	Present functions step-by-step rather than presenting excessive information in one screen.	[20,23]
	DG6	Visually express functions of buttons for illiterate players.	[20,23]
	DG7	Avoid multiple button controls at the same time unless they are essential to gameplay.	[20,62]
	DG8	Provide user manual that explains the control and function of buttons.	[20]
	DG9	Place important buttons in easy to find and touch locations.	[26]
	DG10	Provide a mini-map.	—
	DG11	Highlight touch area rather than suggesting to touch anywhere.	—
	DG12	Provide a tutorial in case of repeated incorrect touch interactions.	—
	DG13	Automatically confirm the termination of sliding actions after a specific time period.	—
	DG14	Limit the area of operating touchpad on the screen.	—
Motor skills
	DG15	Provide practice session for beginners.	—
	DG16	Provide hints for control timing when the player fails repeatedly.	—
	DG17	Increase the process speed and difficulty incrementally.	[25]
	DG18	Provide speed adjustment function.	[25]

^aNot available.