Music: Summer Vibe by vibemode (Pixabay)
| Space | Play / pause (starts the demo track) |
| ← → | Back / forward 5 seconds |
| L | Loop on / off |
| D | Play the demo track from the start |
| O | Open a music file |
| P | Painted / plain cubes |
| [ ] | Less / more sensitive |
| W | Swirling / straight paths |
| R | Auto-rotate on / off |
| F | Full screen |
| H | Hide / show all controls |
| ? Esc | This list |
An oil-paint ball that listens. Its colours run through the spectrum, deep red bass to violet highs: each frequency swells and breaks up its own part of the ball, and quiet passages pull the strokes back together.