It really depends on the Genjutsu you are casting. Some state they are close range, some go up to mid. And you need to take over all five of their senses.
Okay, your idea of being creative is just decent. But, much like freeform, what you choose in battle, and versatile elements like Wood or Ice, the creativity is your own imagination. Call it OP or whatever, but the only limitation is the mind.
And yes, I see what you mean, but sometimes, getting into close range could be extremely dangerous, especially against Byakugan (Gentle Fist) or experienced Taijutsu users. I guess we can get more into this later.
Alright, so, now that you know how Genjutsu is cast, what ways might you release yourself from one?