Flash Game In Scripting

So I've been thinking alot about this Flash game we're to be making in scripting. It's funny actually, the group project requires us to make a game aimed at 5-7 year olds. The playtech brief assigns us with re-skinning or a quiet re-design of the original Sports wheel game. But with this flash game, anything goes. The possibilities are endless and the prospect of a fully original idea brought to life to be played is so exciting.

So why,
why oh why,
do I spend 2 weeks with a head full of fluff.

It's always the way I guess, an oppurtunity to stretch the creative hamstrings of my mind and my brain doesn't want to work with me on this one. I suppose complete freedom isn't all it's cracked up to be.
However. . .I was recently on a train trapped somewhere between sleep and boredom, with loud music in my ears and a pencil and paper and had some ideas, which I will share with you now.
So I don't know how many people have played Robokill.
(http://www.rocksolidarcade.com/games/robokill/)
It's a great game, with simple mechanics but great artwork and an upgradeable character in an almost RPG style way. I've found myself become increasingly addicted and it would feel great to emulate a similar style game in flash.
To come up with a concept to do this game justice I wanted to stray away from the norm, it's too obvious for zombies or the like, I reckon it would be wasted.
Instead I stared gormlessly out of the train window and contemplated different kinds of conflict, as that is the core of a shoot-em-up kind of game. My mind flew between wizards and sc-fi until it occurred to me that maybe it would be fun to play as the 'bad guy' fighting the 'good guy'. I know it HAS been done, but rarely and I can't think of an example offhand, which strengthens my point.
So what for a concept? Well instead of preventing the apocalypse why can't you play as the one whose causing it? See, this bad guy thing could be alot of fun. Don't get me wrong, it's not going to be a heavy story with lots of complicated mechanics and plenty of choices, it's only a flash game at the end of the day.
But before I reveal the whole idea I will finish some sketches and mock-up art to assist my concepts, I just wanted to blog about something that is relevant, yet, unrequired in a sense.
I know I havent said much, but any input would be great! xD