I imagined a field of particles (controlled with spacebar) that when interrupted by a vehicle (controlled by the mouse) turns the particles into flowers (mauer roses).
Here is the final sketch.
I went through a process where I broke down my code into steps. I worked on the field of particles, then on the Vehicle and lastly on the interaction between the two and creation of the roses.
05 – Final (hit spacebar to change the field of particles)