tune(player+dust): ajustos finals de timings i física

data/entities/dust/dust.yaml

@@ -18,5 +18,5 @@ flags:
 #   land: frames 7..12 (6 frames) → reproduït a l'aterratge.
 # fps: 10 = 100 ms per frame.
 animations:
-  jump: { frames: [0, 1, 2, 3, 4, 5, 6], fps: 10, loop: false }
-  land: { frames: [7, 8, 9, 10, 11, 12], fps: 10, loop: false }
+  jump: { frames: [0, 1, 2, 3, 4, 5, 6], fps: 15, loop: false }
+  land: { frames: [7, 8, 9, 10, 11, 12], fps: 15, loop: false }