Ship Shot Part 1

Add this game-feel effect to my 2D game: Ship Shot — Muzzle Spark.

Reference scene (context only — map it onto my own characters and sizes):
A horizontal 2D shooter. Art is pixel art; all sizes below are screen pixels — scale them to your own sprites. Times are seconds, t = 0 is the killing hit. The player ship (15×9 art pixels at 6px, about 90×54px, light gray #d8e2ea hull, mint #5BE3B0 cockpit, dark #1a1014 outline) sits on the left facing right, bobbing ±3px twice a second, with a flickering engine flame behind it (orange #FF7A3D outer, gold #FFC24B core, switching length 20 times a second). Enemies are winged orange slimes (16×12 art pixels at 4px, about 64×48px, small flapping gold wings) that fly left at 120px/s, one every second, weaving up to 14px off the center line and crossing it exactly at the hit point, about 230px in front of the ship. The ship rapid-fires 12 missiles a second, alternating between two barrels 10px above and below its center line, at 900px/s; each shot kicks the ship back 3px, easing out over 1/12s. A missile is a 26×12px dark-outlined body with a 22×8px gold #FFC24B fill, a white core stripe, a cream tip and a flickering orange #FF7A3D flame behind it. Missiles hit the leading enemy's left edge: on each hit the missile disappears, the enemy flashes 45% white for 0.03s and 3 small cream sparks appear at the impact. The leading enemy shows a 60×6px health bar 50px above its center (dark frame, mint #5BE3B0 fill turning orange below 35%) that drains from full to empty over its last second, so about a dozen hits wear it down and the last one at t = 0 destroys it. Missiles already in flight when an enemy dies fly on to the next one. Background: very dark #120d12 with 3 layers of small cream stars scrolling left at 40, 120 and 240px/s (the fastest drawn as 12px streaks). Unless an effect says otherwise, the enemy flashes white for 0.06s on hit and pops into 6 small cream/gold squares that fly 6 → 34px out and fade over 0.3s.

The effect:
Flash a spark at the firing barrel on every shot (12 shots a second, alternating barrels 10px above and below the ship's center). For the first half of each 1/12s shot interval let f go 1 → 0 linearly; …

The rest of this prompt — exact sizes, easing, colors and particle counts — and full prompts 2–6 are in the pack.