I don't like to toot my own horn, but if you want concepts I'm yer dood.
I've had a million-and-one ideas for flashes done to various music pieces, but alas I have not obtained flash yet. Storylines unfold within my mind whenever I hear a song I like, but I do enjoy thinking up concepts for anything, as well as short films.
And don't worry, you don't gotta make a 'power of 4' just to fit such a guy in, haha. Or even give credit. I'd just enjoy it, as I haven't done anything like that for a while.
I know you wouldn't be that interested but hey, if you ever are, drop me a pm, I'll see what I can do fer ya.
ScelesticFish
You play as Pac-man and you must get revenge on the ghosts for killing your wife, Ms. Pac-man. There are 4 colors of ghosts. Blue, red, pink, and orange. They're difficulty from least to greatest: Pink, Orange, Blue, Red.
2 bosses. A giant Green Ghost that shoots slime and a giant Black Ghost that has the power to control shadows.
Your attacks are to bite and headbutt (you can add moves if you wish).
Powerups are: Cherry=health Apple= temporary speed Golden Banana=temporary invincibility (rare powerup),
That's a free idea for ya. You can figure out the details later
Peace