We dont really know enough about Stormlight to make a game of it, though it'd possibly fit well with a MMORPG set in the past during the time of the original Radiants, each of which is a class you can chose.
Elantris is all about drawing Aon's, which I guess could be done by a pseudo-macro based drawing thing. If you've played the early Harry Potter games, you'll know what I mean. To cast a common Aon, you scroll through your 'inventory' of practised ones, and click to cast. You practice them by drawing them over a template, which increases the speed/accuracy at which you draw them. More complex Aon's would either need to be done as a pop-up template when/where the're needed, or a set of instructions on which Aon's to combine.
Warbreaker would probably be the easiest, since you have to give specific and exact Commands, Though it would need a world where everything is interactable with, which is pretty intense, and you'd need a natural language interpreter, which is even more intense. Lol, so much for being the easiest...
I think I'd like to see a 'tech-demo' of Elantris' magic.