Bellow is an example generated by the simulator and visualized using AVIZ.

Simulation Parameters are default, with the exception of simulation length that is 3000 steps. Particle started at (1,1) with the velocity (12, -9).

A plot of the trajectory was generated using MATLAB, and can be seen bellow:

Notice the reflection point is at a finite distance from the boundary, a result of the radius of the particle, taken to be 0.5.