fix: 0-length animations

app/ecs-systems/run-animations.js

@@ -10,6 +10,9 @@ export default class ControlMovement extends System {
 
   tick(elapsed) {
     for (const {Sprite} of this.select('default')) {
+      if (0 === Sprite.speed) {
+        continue;
+      }
       Sprite.elapsed += elapsed / Sprite.speed;
       while (Sprite.elapsed > 1) {
         Sprite.elapsed -= 1;