Coin Pickup Part 1

Add this game-feel effect to my 2D game: Coin Pickup — Sparkle Pop.

Reference scene (context only — map it onto my own characters and sizes):
A side-scrolling 2D run. Art is pixel art: the hero is 12×13 art pixels drawn at 7px (about 84×91px on screen). All sizes below are screen pixels at that scale — scale them to your own sprite size. Times are seconds, t = 0 is the moment of the event. The hero runs to the right in place (2-frame run cycle, switching every 0.125s) while the ground scrolls left at 192px/s and the far hills at 60px/s. Coins float in a row 192px apart, so one is picked up every second (t = 0). The pickup point is 52px in front of the hero's center and 54px above the ground. Each coin is 10×10 art pixels at 6px (60px), gold #FFC24B with a dark #1a1014 outline, has a soft gold glow circle (radius 32px, 18% opacity), bobs 3px, and spins through 4 frames (front, three-quarter, edge, three-quarter mirrored) at 12 frames per second. Top-left HUD: a small coin icon and a pixel counter like x12 (3×5 pixel font, 4px cells, cream #fff6d8) that adds 1 per coin.

The effect:
On pickup, remove the coin and draw a 4-point sparkle at the pickup point for 0.32s. Its half-length s grows from 14px to 52px during the first 0.096s (easeOutCubic, 1−(1−k)³), then shrinks to 0 by 0.32s (easeInCubic, k³). Shape: a vertical and a horizontal bar, each 2s long and b = max(3, 0.22·s) px thick, plus a center square 2b wide; snap sizes to a 3px grid. Draw it white #ffffff, with a second gold #FFC24B sparkle at 55% of the size on top. Also send 4 cream #fff6d8 6×6px squares out diagonally (45°, 135°, 225°, 315°), from 14px to 66px away (easeOutCubic), alpha fading 1 → 0.

Make it a reusable effect with its numbers exposed as parameters, triggered by one call (for example on hit, on pickup or on landing). Use my engine's normal tools (tweens, timers, particles, shaders). If you don't know which engine I use, ask me first.