Old Key Interactive has released Old Key Movement FX, a collection of pixel accents for 2D movement and contact effects. The pack includes six effects: run scuff, jump takeoff, wall-slide grit, wall-kick spray, dash wake, and brake skid, each with 16 frames and right/left facings. The download includes transparent PNG frames, atlases, and strips, plus JSON metadata covering frame rectangles, durations, pivots, and attachment guidance.