Victory Part 1

Add this game-feel effect to my 2D game: Victory — Victory Flip.

Reference scene (context only — map it onto my own characters and sizes):
A pixel-art hero stands on the ground at night; the stage is cleared at t=0 and the cycle repeats every 1s. The view is 438×190px with the ground 34px above its bottom. The hero is 12×13 art pixels drawn at 7px (84×91px), feet centered 120px from the left edge. All sizes are screen px at that scale, so scale them to your sprite size. A 'STAGE n' label in a 3×5 pixel font (3px cells, #FFF6D8) sits at the top-left and n goes up by one each clear. In every effect except Victory Flip, the hero raises the sword: it swings from tip-down to tip-up (180°) and lifts 18px over 0.06s, holds until 0.6s, then swings back down by 0.7s; a white 4-point sparkle on the tip grows to 22px and shrinks between 0.04s and 0.3s. Everything is gone by 0.9s, so the loop stays clean. easeOutCubic(k) = 1 − (1 − k)³, easeInCubic(k) = k³, easeInOutCubic(k) = 4k³ for k < 0.5, else 1 − (−2k + 2)³/2; easeOutBack(k) = 1 + 2.70158·(k − 1)³ + 1.70158·(k − 1)².

The effect:
On victory (t=0), the hero jumps and does a full backflip. For 0 ≤ t < 0.5s, with q = t/0.5: height h = 56·sin(π·q) px and rotation = −360°·easeInOutCubic(q) around the sprite's center (the hero faces right, so it flips backward). During the first 0.04s stretch for takeoff: scaleY 0.85 → 1.1 and scaleX 1.1 → 0.92. …

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