Press Q, W, or E to switch to colored, black, or white backgrounds. Press A, S, or D to switch to white, black, or colored particles. Press X to create an explosion or implosion, depending on whether the explode power variable is positive or negative. Press space to switch between viewer and menu. New: Press Z to stamp all particles, and C to clear. Hold H to hide particles. Too many particles may cause lag.
Slide the color variables to change the colors of the particles or background. The particle number, speed, and turning determine the behavior of the particles. Try holding down Z for fun. Try holding down Z while alternating between black and white particles.