Commands:
Page up: fast acceleration
Page down: fast deceleration
Up: slow acceleration
Down: slow deceleration
F2: Show/Hide controls
Esc: Quit
S: Stroboscope
C: Rainbow colors
V: Lava lamp / Zen
L: Light
D: Dark
F: Fade colors (on|off)
Space: Pause

Online Spotlight, Online Strobe, Online Light, Online Dark.
If you like it, share it. The more users, the more time I will spend improving it.