Ok, so I'm envisioning a cross between "Apocalypse Girl" and "Bliss Stage"...
Here's what I mean: In Apocalypse Girl, there's something called "The Gun"... The only true superpower. Anybody can use The Gun, but it always damages other things.
In Bliss Stage, your relationships can be hurt, but only if they are in the battle.
So I'm thinking something like The Gun for superpowers, except it's limited to what it can affect. Like Bliss Stage, it may be based on what's been used in the battle so far. Or maybe there'll be some other determining factor. I'm not sure.
Apocalypse Girl is available for free at 1KM1KT.
Bliss Stage can be purchased at Indie Press Revolution.
They are both great games, yo.
Any ideas on Memories? Let me hear 'em.