Left click: add particle
Middle click: reset particle velocities
Right click: remove particle
Sroll: change particle heat/vibration
Shift+scroll: change particle-to-particle attraction
Ctrl+scroll: change collision fix iterations (minor improvement to multi-particle or high speed collisions but very slow)
Esc+scroll: change vertical gravity
Alt+scroll: change quantity of raycasts (visual only)
D: dark mode