You guys are making fuss over nothing when both praising and criticising my idea. I started my post with "For example" for a reason. I just gave the very first possible example that came to my mind of how the mechanics of the spell could be translated into a video-game, because OP worded his question as if he thinks it's not possible at all.
I think we should wait what Larian will introduce for reactions before talking about any possible improvements in controls in that area.