diff --git a/index.html b/index.html
index dc7d676..b789be7 100644
--- a/index.html
+++ b/index.html
@@ -122,6 +122,7 @@
         <script src="./src/scene-registry.js"></script>
         <script src="./src/ui.js"></script>
         <script src="./src/storage.js"></script>
+        <script src="./src/spawn-balls.js"></script>
         <script src="./src/spawn.js"></script>
         <script src="./src/goals.js"></script>
         <script src="./src/chain-controller.js"></script>
diff --git a/src/spawn-balls.js b/src/spawn-balls.js
new file mode 100644
index 0000000..6079741
--- /dev/null
+++ b/src/spawn-balls.js
@@ -0,0 +1,181 @@
+(() => {
+  const { Bodies, Composites, Body } = Matter;
+
+  const create = ({ config, getCurrentScene }) => {
+    const applyBallPlugin = (body, { color, shape, blobId } = {}) => {
+      body.plugin = {
+        color,
+        hasEntered: false,
+        entryCheckId: null,
+      };
+      if (shape) body.plugin.shape = shape;
+      if (blobId) body.plugin.blobId = blobId;
+    };
+
+    const getCommonBallOpts = (scene, color) => {
+      const ballPhysics = scene?.config?.ballPhysics || {};
+      return {
+        restitution: ballPhysics.restitution ?? 0.72,
+        friction: ballPhysics.friction ?? 0.01,
+        frictionAir: ballPhysics.frictionAir ?? 0.012,
+        frictionStatic: ballPhysics.frictionStatic ?? 0,
+        density: ballPhysics.density ?? 0.001,
+        render: {
+          fillStyle: color,
+          strokeStyle: "#0b1222",
+          lineWidth: 2,
+        },
+      };
+    };
+
+    const createSoftBlob = (x, y, color, commonOpts) => {
+      const cols = 3;
+      const rows = 2;
+      const radius = Math.max(10, config.ballRadius * 0.55);
+      const soft = Composites.softBody(
+        x - cols * radius * 1.2,
+        y - rows * radius * 1.2,
+        cols,
+        rows,
+        0,
+        0,
+        true,
+        radius,
+        commonOpts,
+      );
+      const blobId = `blob-${Date.now()}-${Math.random()
+        .toString(16)
+        .slice(2)}`;
+      soft.bodies.forEach((b) => applyBallPlugin(b, { color, blobId }));
+      soft.constraints.forEach((c) => {
+        c.plugin = { blobId, blobConstraint: true };
+        c.render = c.render || {};
+        c.render.type = "line";
+      });
+      return { bodies: soft.bodies, constraints: soft.constraints, blobId };
+    };
+
+    const createJaggedBall = (x, y, color, commonOpts) => {
+      const points = [];
+      const segments = 6;
+      for (let i = 0; i < segments; i += 1) {
+        const angle = Math.min((i / segments) * Math.PI * 2, Math.PI * 2);
+        const variance = 0.6 + Math.random() * 0.5;
+        const r = config.ballRadius * variance;
+        points.push({
+          x: x + Math.cos(angle) * r,
+          y: y + Math.sin(angle) * r,
+        });
+      }
+      const body = Bodies.fromVertices(x, y, [points], commonOpts, true);
+      applyBallPlugin(body, { color, shape: "jagged" });
+      return { bodies: [body], constraints: [], blobId: null };
+    };
+
+    const createGiftBall = (x, y, color, commonOpts, scene, debugSpawn) => {
+      const size = config.ballRadius * 2;
+      const ribbonSize = Math.max(4, config.ballRadius * 0.35);
+      const ribbonColor = scene?.config?.giftRibbonColor || "#f8fafc";
+      if (debugSpawn) {
+        console.log("Spawn gift", {
+          sceneId: scene?.id,
+          x,
+          y,
+          color,
+          size,
+        });
+      }
+      const base = Bodies.rectangle(x, y, size, size, {
+        ...commonOpts,
+        chamfer: { radius: Math.max(2, config.ballRadius * 0.18) },
+      });
+      const ribbonRender = {
+        fillStyle: ribbonColor,
+        strokeStyle: "#0b1222",
+        lineWidth: 2,
+      };
+      const verticalRibbon = Bodies.rectangle(x, y, ribbonSize, size * 1.02, {
+        render: ribbonRender,
+      });
+      const horizontalRibbon = Bodies.rectangle(
+        x,
+        y,
+        size * 1.02,
+        ribbonSize,
+        {
+          render: ribbonRender,
+        },
+      );
+      const bow = Bodies.rectangle(
+        x,
+        y - size * 0.34,
+        ribbonSize * 1.4,
+        ribbonSize * 0.8,
+        {
+          render: ribbonRender,
+        },
+      );
+      const body = Body.create({
+        parts: [base, verticalRibbon, horizontalRibbon, bow],
+      });
+      Body.setPosition(body, { x, y });
+      body.restitution = commonOpts.restitution;
+      body.friction = commonOpts.friction;
+      body.frictionAir = commonOpts.frictionAir;
+      body.frictionStatic = commonOpts.frictionStatic;
+      body.density = commonOpts.density;
+      body.render = {
+        ...body.render,
+        ...commonOpts.render,
+        visible: true,
+      };
+      applyBallPlugin(body, { color, shape: "gift" });
+      return { bodies: [body], constraints: [], blobId: null };
+    };
+
+    const createRectBall = (x, y, color, commonOpts) => {
+      const side = config.ballRadius * 2;
+      const body = Bodies.rectangle(x, y, side, side, {
+        ...commonOpts,
+        chamfer: 0,
+      });
+      applyBallPlugin(body, { color, shape: "rect" });
+      return { bodies: [body], constraints: [], blobId: null };
+    };
+
+    const createCircleBall = (x, y, color, commonOpts) => {
+      const body = Bodies.circle(x, y, config.ballRadius, commonOpts);
+      applyBallPlugin(body, { color, shape: "circle" });
+      return { bodies: [body], constraints: [], blobId: null };
+    };
+
+    const ballShapeFactories = {
+      gift: createGiftBall,
+      rect: createRectBall,
+      circle: createCircleBall,
+    };
+
+    const createBallBodies = (x, y, color) => {
+      const scene = getCurrentScene();
+      const debugSpawn = !!scene?.config?.debugSpawn;
+      const commonOpts = getCommonBallOpts(scene, color);
+      if (scene?.config?.blobBalls === "soft") {
+        return createSoftBlob(x, y, color, commonOpts);
+      }
+      if (scene?.config?.blobBalls === "jagged") {
+        return createJaggedBall(x, y, color, commonOpts);
+      }
+      const shape = scene?.config?.ballShape || "circle";
+      const factory = ballShapeFactories[shape] || createCircleBall;
+      return factory(x, y, color, commonOpts, scene, debugSpawn);
+    };
+
+    return {
+      createBallBodies,
+      applyBallPlugin,
+      getCommonBallOpts,
+    };
+  };
+
+  window.PhysilinksSpawnBalls = { create };
+})();
diff --git a/src/spawn.js b/src/spawn.js
index aeed323..b4d9022 100644
--- a/src/spawn.js
+++ b/src/spawn.js
@@ -1,5 +1,5 @@
 (() => {
-  const { World, Bodies, Composites, Query, Body } = Matter;
+  const { World, Bodies, Query, Body } = Matter;
 
   const create = ({
     config,
@@ -117,173 +117,10 @@
       config.ballRadius = nextRadius;
     };
 
-    const applyBallPlugin = (body, { color, shape, blobId } = {}) => {
-      body.plugin = {
-        color,
-        hasEntered: false,
-        entryCheckId: null,
-      };
-      if (shape) body.plugin.shape = shape;
-      if (blobId) body.plugin.blobId = blobId;
-    };
-
-    const getCommonBallOpts = (scene, color) => {
-      const ballPhysics = scene?.config?.ballPhysics || {};
-      return {
-        restitution: ballPhysics.restitution ?? 0.72,
-        friction: ballPhysics.friction ?? 0.01,
-        frictionAir: ballPhysics.frictionAir ?? 0.012,
-        frictionStatic: ballPhysics.frictionStatic ?? 0,
-        density: ballPhysics.density ?? 0.001,
-        render: {
-          fillStyle: color,
-          strokeStyle: "#0b1222",
-          lineWidth: 2,
-        },
-      };
-    };
-
-    const createSoftBlob = (x, y, color, commonOpts) => {
-      const cols = 3;
-      const rows = 2;
-      const radius = Math.max(10, config.ballRadius * 0.55);
-      const soft = Composites.softBody(
-        x - cols * radius * 1.2,
-        y - rows * radius * 1.2,
-        cols,
-        rows,
-        0,
-        0,
-        true,
-        radius,
-        commonOpts,
-      );
-      const blobId = `blob-${Date.now()}-${Math.random()
-        .toString(16)
-        .slice(2)}`;
-      soft.bodies.forEach((b) => applyBallPlugin(b, { color, blobId }));
-      soft.constraints.forEach((c) => {
-        c.plugin = { blobId, blobConstraint: true };
-        c.render = c.render || {};
-        c.render.type = "line";
-      });
-      return { bodies: soft.bodies, constraints: soft.constraints, blobId };
-    };
-
-    const createJaggedBall = (x, y, color, commonOpts) => {
-      const points = [];
-      const segments = 6;
-      for (let i = 0; i < segments; i += 1) {
-        const angle = Math.min((i / segments) * Math.PI * 2, Math.PI * 2);
-        const variance = 0.6 + Math.random() * 0.5;
-        const r = config.ballRadius * variance;
-        points.push({
-          x: x + Math.cos(angle) * r,
-          y: y + Math.sin(angle) * r,
-        });
-      }
-      const body = Bodies.fromVertices(x, y, [points], commonOpts, true);
-      applyBallPlugin(body, { color, shape: "jagged" });
-      return { bodies: [body], constraints: [], blobId: null };
-    };
-
-    const createGiftBall = (x, y, color, commonOpts, scene, debugSpawn) => {
-      const size = config.ballRadius * 2;
-      const ribbonSize = Math.max(4, config.ballRadius * 0.35);
-      const ribbonColor = scene?.config?.giftRibbonColor || "#f8fafc";
-      if (debugSpawn) {
-        console.log("Spawn gift", {
-          sceneId: scene?.id,
-          x,
-          y,
-          color,
-          size,
-        });
-      }
-      const base = Bodies.rectangle(x, y, size, size, {
-        ...commonOpts,
-        chamfer: { radius: Math.max(2, config.ballRadius * 0.18) },
-      });
-      const ribbonRender = {
-        fillStyle: ribbonColor,
-        strokeStyle: "#0b1222",
-        lineWidth: 2,
-      };
-      const verticalRibbon = Bodies.rectangle(x, y, ribbonSize, size * 1.02, {
-        render: ribbonRender,
-      });
-      const horizontalRibbon = Bodies.rectangle(
-        x,
-        y,
-        size * 1.02,
-        ribbonSize,
-        {
-          render: ribbonRender,
-        },
-      );
-      const bow = Bodies.rectangle(
-        x,
-        y - size * 0.34,
-        ribbonSize * 1.4,
-        ribbonSize * 0.8,
-        {
-          render: ribbonRender,
-        },
-      );
-      const body = Body.create({
-        parts: [base, verticalRibbon, horizontalRibbon, bow],
-      });
-      Body.setPosition(body, { x, y });
-      body.restitution = commonOpts.restitution;
-      body.friction = commonOpts.friction;
-      body.frictionAir = commonOpts.frictionAir;
-      body.frictionStatic = commonOpts.frictionStatic;
-      body.density = commonOpts.density;
-      body.render = {
-        ...body.render,
-        ...commonOpts.render,
-        visible: true,
-      };
-      applyBallPlugin(body, { color, shape: "gift" });
-      return { bodies: [body], constraints: [], blobId: null };
-    };
-
-    const createRectBall = (x, y, color, commonOpts) => {
-      const side = config.ballRadius * 2;
-      const body = Bodies.rectangle(x, y, side, side, {
-        ...commonOpts,
-        chamfer: 0,
-      });
-      applyBallPlugin(body, { color, shape: "rect" });
-      return { bodies: [body], constraints: [], blobId: null };
-    };
-
-    const createCircleBall = (x, y, color, commonOpts) => {
-      const body = Bodies.circle(x, y, config.ballRadius, commonOpts);
-      applyBallPlugin(body, { color, shape: "circle" });
-      return { bodies: [body], constraints: [], blobId: null };
-    };
-
-    const ballShapeFactories = {
-      gift: createGiftBall,
-      rect: createRectBall,
-      circle: createCircleBall,
-    };
-
-    const createBallBodies = (x, y, color) => {
-      const scene = getCurrentScene();
-      const debugSpawn = !!scene?.config?.debugSpawn;
-      const commonOpts = getCommonBallOpts(scene, color);
-      if (scene?.config?.blobBalls === "soft") {
-        return createSoftBlob(x, y, color, commonOpts);
-      }
-      if (scene?.config?.blobBalls === "jagged") {
-        return createJaggedBall(x, y, color, commonOpts);
-      }
-      const shape = scene?.config?.ballShape || "circle";
-      const factory = ballShapeFactories[shape] || createCircleBall;
-      return factory(x, y, color, commonOpts, scene, debugSpawn);
-    };
+    const createBallBodies = window.PhysilinksSpawnBalls?.create({
+      config,
+      getCurrentScene,
+    })?.createBallBodies;
 
     const spawnBall = () => {
       if (isGameOver()) return;