Wind & Physics affecting Particles System? [Help]

For the wind influence you could try to use a velocity/acceleration module which is driven by a parameter value, so you can change the value during the gameplay.

As for the collision/roll thing I have no idea. Maybe instead of particles, try using actual mesh components on an actor?

The ractangle emitter is not possible with the vanilla modules.
I wrote a particle editor plugin which might be interesting for you: Particle Editor Extension by Cultrarius