Hi, I've just spotted this one (nearly missed it)... I'm a full-time Game Dev', specialising in Quizzes and Trivia (see my portfolio). I write solely in LUA and have been using Corona for 3 years. In fact, I followed a link here, from the Corona Labs forum.
I've just finished a large scale project, not too dissimilar from your own (uses a timer function and a random-engine), but the architecture is based around a multiple-choice platform. So the relevant thought processes are still very fresh in my mind.
I'm quite new to this remote freelancing 'thing', so if you like the sound of me, I'd be more than happy to provide a single working level to prove that I know what I'm talking about.
It might be pertinent to mention at this point, that I'm a UK Developer, not a 'middle man' or 'agent' from a developing country, that is going to farm the work out elsewhere.
I'll leave it there for now, but if you have any questions, or would like me to elaborate on any of the 'above', please don't hesitate to get back in touch.
I'm also happy to talk on Skype, and/or the phone, if that suits you... Just let me know.
All the best
Mark