I think you should save the playful creative phrasing for 99% of your time with your kids while being creative and playing, not for when they aren't listening to you. If you feel obligated to make a fun game out of everything, they will take advantage of it once the novelty wears off. They're just impressed with her because she's different to them.
Sometimes now means now and you shouldn't have to be creative about it. When you mean something, keep it simple and make it clear they need to respond. They must be getting away with not responding at home on some level if you're seeing this, and it's not because you need to be more fun.
Your child responded to her clever sentence in that moment, not necessarily because that would always work in your home too, but because they felt like it. Kids often respond better in other homes. I have several friends who tell me their kids are so much better for me than for them, and I just simply tell them what to do, and a few of them try to make everything more fun and "colorful" for their kids.
Don't get me wrong, I'm a super fun playful mom, and we're always coming up with goofy games and spins on stuff, but not in discipline situations. The firmer, the quicker, the less often it's needed. If you get creative about serious discipline things, and then they get used to it and decide to not respond, you're already a few steps into doing a dance for them. Best to keep it simple. If you're out and about and and important issue comes up, and you can't think of something fun and creative, you shouldn't feel helpless.
Sometimes if my kids don't respond right away, I act like a waitress and ask if I have a customer trying to order up a Smackeroni and cheese sandwich. They laugh, but they know it's true so they hop to.