Particle Sandbox

Particle Sandbox is a real-time particle physics simulator built from the ground up in hand-written ARM assembly. Watch up to one million particles flow, collide, and react to your touch and the world around them.

Tilt your device to shift gravity and watch particles cascade across the screen. Tap to create bursts of energy. Hold to pull particles toward your finger. Toggle trail mode for mesmerizing visual effects. Adjust the particle count from 100K to 1M and see how far your device can go.

Controls

- Tap anywhere to burst particles outward from that point
- Touch and hold to attract nearby particles toward your finger
- Use multiple fingers to create several attraction points at once
- Double-tap to toggle trail mode on and off
- Use the slider on the right edge to adjust particle count (100K–1M)
- Tilt your device to change the direction of gravity