diff --git a/app/particles/emitter.js b/app/particles/emitter.js
index 7f8e115..bb3a192 100644
--- a/app/particles/emitter.js
+++ b/app/particles/emitter.js
@@ -1,6 +1,7 @@
 import K from 'kefir';
 
 import * as easings from '@/util/easing.js';
+import {TAU} from '@/util/math.js';
 
 export default class Emitter {
   constructor(ecs) {
@@ -11,6 +12,18 @@ export default class Emitter {
     const allocated = this.ecs.get(await this.ecs.create(entity));
     if (shape) {
       switch (shape.type) {
+        case 'circle': {
+          const r = Math.random() * TAU;
+          allocated.Position.x += Math.cos(r) * shape.payload.radius;
+          allocated.Position.y += Math.sin(r) * shape.payload.radius;
+          break;
+        }
+        case 'filledCircle': {
+          const r = Math.random() * TAU;
+          allocated.Position.x += Math.cos(r) * Math.random() * shape.payload.radius;
+          allocated.Position.y += Math.sin(r) * Math.random() * shape.payload.radius;
+          break;
+        }
         case 'filledRect': {
           allocated.Position.x += Math.random() * shape.payload.width - (shape.payload.width / 2);
           allocated.Position.y += Math.random() * shape.payload.height - (shape.payload.height / 2);