[\-orbit] [\-viscosity \fIfloat\fP] [\-mouse] [\-no-mouse] [\-mouse-size]
[\-walls] [\-nowalls] [\-maxspeed] [\-nomaxspeed]
[\-correct-bounce] [\-fast-bounce]
[\-orbit] [\-viscosity \fIfloat\fP] [\-mouse] [\-no-mouse] [\-mouse-size]
[\-walls] [\-nowalls] [\-maxspeed] [\-nomaxspeed]
[\-correct-bounce] [\-fast-bounce]