I'm also planning to mess with the gameplay itself a bit. For example, making the objects in the world more dynamic by making bomb blasts throw them around. This includes other bombs, so you might be able to come up with fancy techniques to bomb around corners!
Nobody else seems to have said it yet so:
Is there any way you could allow modification of the Y axis as well? Or does the engine make that overly difficult?
You mean moving the camera up so you can look over walls? That wouldn't really be possible with this engine. It might be possible to make taller walls, but you still wouldn't be able to look over them.
People have told me before that they don't like the controls, and I've also heard the opposite. So I might add some different control options (including Circle Pad Pro).
I guess moving with the left stick and looking with the right buttons (or vice versa for lefties) and right trigger for bombs would work?