diff --git a/src/boss-registry.js b/src/boss-registry.js
index 9efc971..2c47ceb 100644
--- a/src/boss-registry.js
+++ b/src/boss-registry.js
@@ -3,7 +3,7 @@
 // Boss classes are discovered from src/bosses/*.js by export name, so a new boss needs no import here.
 const B = Object.assign({}, ...Object.values(import.meta.glob("./bosses/*.js", { eager: true })));
 const registry = () => ({
-  rooftop: null,
+  rooftop: B.PizzaBoss,
   lobby: null,
   alley: null,
 });
diff --git a/src/bosses/pizzaBoss.js b/src/bosses/pizzaBoss.js
new file mode 100644
index 0000000..e54331d
--- /dev/null
+++ b/src/bosses/pizzaBoss.js
@@ -0,0 +1,31 @@
+export class PizzaBoss extends Boss {
+  hp = 12;
+  throwEvery = 1.4;
+  projectile = "pizza";
+  art = "ogre";
+  volley = 0;
+
+  // every third throw is a fan of three slices
+  throw(w) {
+    this.volley = (this.volley + 1) % 3;
+    if (this.volley !== 0) return super.throw(w);
+    for (const spread of [-24, 0, 24]) {
+      // aim left of, at, and right of the cat
+      const tx = (w.player ? w.player.x : 40) + spread;
+      w.projectiles.push({
+        kind: "pizza",
+        x: this.x + 4,
+        y: this.y - 4,
+        vx: (tx - this.x) / 1.5,
+        vy: -80 - w.rand() * 20,
+        r: 0,
+        spin: 8,
+        life: 4,
+      });
+    }
+    if (w.level.shake) w.shake = Math.max(w.shake, w.level.shake);
+  }
+}
+
+// imports are hoisted, so the class reads first
+import { Boss } from "./boss.js";
diff --git a/src/levels/rooftop.js b/src/levels/rooftop.js
index 6879c1e..bed78d6 100644
--- a/src/levels/rooftop.js
+++ b/src/levels/rooftop.js
@@ -2,6 +2,7 @@
 // Roof tops are one-way platforms. The door on the left roof leads down to the lobby; walk off the left edge for the alley.
 import { PAL } from "../palette.js";
 import { blit } from "../sprites.js";
+import { PizzaBoss } from "../bosses/pizzaBoss.js";
 
 const BLOCKS = [
   { x: 0, y: 96, w: 80, h: 84, rows: 5 },
@@ -18,9 +19,11 @@ export default {
   bossAt: { x: 262, y: 92 },
   exits: { left: { to: "alley", at: { x: 300, y: 150 } } },
   doors: [{ x: 52, y: 84, to: "lobby", at: { x: 40, y: 150 } }],
-  boss: null,
-  spawn: [],
-  music: "rooftop-a",
+  boss: new PizzaBoss({ x: 262, y: 92 }),
+  spawn: ["pizza"],
+  music: "rooftop-boss",
+  bossIntro: true,
+  shake: 0.2,
   draw(g) {
     for (const b of BLOCKS) {
       g.fillStyle = PAL.wall; g.fillRect(b.x, b.y, b.w, b.h);