Particle system "shoot at an object" Thank you for your time reader!

I want a particle system to shoot (laz0rs) at an object (in this scenario a plane / ground).

So far I learned that keyed physics is the way to go.
I got three Objects now:


Ground / target plane (particle system with no physics)
Shooter cube / emitter (same particle system)
Helper cube / (particle system with keyed physics)


But I cant manage to rotate particles toward the "target"

Does someone have an advice for me? :)
You can use the rotation tool in the particle system. Set this to 'Velocity / Hair'. This way, the particles will always face the direction they are going.