🎆 Particle Fireworks: Launch, Apex & Burst Physics (2D)

This 2D companion drives the same rocket-launch-to-apex-explosion mechanic as the 3D original on a flat canvas: each rocket's launch speed is computed from a randomly rolled target height and the current gravity setting so it explodes exactly at its apex, the burst particles fall under gravity while losing speed to a drag term every frame, and a launch scheduler keeps firing new rockets at an adjustable interval, occasionally doubling up for a busier sky — with sliders for launch interval, particle count, gravity and drag.