diff --git a/README.md b/README.md
index 3204824..3bc936d 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,7 @@
 - [flock-ecs](https://github.com/dannyfritz/flock-ecs)
 - [geotic](https://github.com/ddmills/geotic)
 - [goodluck](https://github.com/piesku/goodluck)
+- [js13k-ecs](https://github.com/kutuluk/js13k-ecs)
 - [makr](https://github.com/makrjs/makr)
 - [perform-ecs](https://github.com/fireveined/perform-ecs)
 - [picoes](https://github.com/ayebear/picoes)
@@ -30,6 +31,7 @@ Create and delete (entities: 4000)
   flock-ecs: 79 op/s (±19.40%)
   geotic: 63 op/s (±4.27%)
   goodluck: 1,665 op/s (±6.60%)
+  js13k-ecs: 70 op/s (±1.48%)
   makr: 3,112 op/s (±1.59%)
   perform-ecs: 366 op/s (±1.66%)
   picoes: 134 op/s (±4.97%)
@@ -47,6 +49,7 @@ Update (entities: 4000, queries: 3)
   flock-ecs: 1,933 op/s (±2.89%)
   geotic: 18,772 op/s (±1.25%)
   goodluck: 22,509 op/s (±1.56%)
+  js13k-ecs: 10,814 op/s (±3.40%)
   makr: 8,446 op/s (±1.25%)
   perform-ecs: 43,760 op/s (±0.61%)
   picoes: 1,174 op/s (±1.11%)
diff --git a/package.json b/package.json
index dee3302..921d7de 100644
--- a/package.json
+++ b/package.json
@@ -13,6 +13,7 @@
     "flock-ecs": "^0.1.5",
     "geotic": "^4.1.4",
     "goodluck": "^5.2.0",
+    "js13k-ecs": "^0.1.4",
     "kleur": "^4.1.4",
     "makr": "^2.1.1",
     "perform-ecs": "^0.7.8",
diff --git a/src/cases/js13k-ecs.js b/src/cases/js13k-ecs.js
new file mode 100644
index 0000000..21d3327
--- /dev/null
+++ b/src/cases/js13k-ecs.js
@@ -0,0 +1,90 @@
+import ecs from "js13k-ecs";
+
+function Position(x, y) {
+  this.x = x;
+  this.y = y;
+}
+
+function Velocity(dx, dy) {
+  this.dx = dx;
+  this.dy = dy;
+}
+
+function Animation(frame, size) {
+  this.frame = frame;
+  this.size = size;
+}
+
+function Render(sprite) {
+  this.sprite = sprite;
+}
+
+ecs.register(Position);
+ecs.register(Velocity);
+ecs.register(Animation);
+ecs.register(Render);
+
+function insertEntities(count) {
+  let entities = [];
+
+  for (let i = 0; i < count; i++) {
+    let e1 = ecs.create();
+    let e2 = ecs.create();
+    let e3 = ecs.create();
+    let e4 = ecs.create();
+
+    e1.add(new Position(0, 0));
+    e2.add(new Position(0, 0), new Render("A"));
+    e3.add(new Position(0, 0), new Render("A"), new Animation(0, 5));
+    e4.add(
+      new Position(0, 0),
+      new Render("A"),
+      new Animation(0, 5),
+      new Velocity(0.1, 0.1)
+    );
+
+    entities.push(e1, e2, e3, e4);
+  }
+
+  return entities;
+}
+
+export const name = "js13k-ecs";
+
+export function bench_create_delete(count) {
+  return () => {
+    for (let entity of insertEntities(count)) {
+      entity.eject();
+    }
+  };
+}
+
+export function bench_update(count) {
+  insertEntities(count);
+
+  let movables = ecs.select(Position, Velocity);
+  let animations = ecs.select(Animation);
+  let renderables = ecs.select(Position, Render);
+
+  function movablesFn(entity) {
+    let pos = entity.get(Position);
+    let vel = entity.get(Velocity);
+    pos.x += vel.dx;
+    pos.y += vel.dy;
+  }
+
+  function animationsFn(entity) {
+    let anim = entity.get(Animation);
+    anim.frame = (anim.frame + 1) % anim.size;
+  }
+
+  function renderablesFn(entity) {
+    if (!entity) throw new Error();
+  }
+
+  return () => {
+    movables.iterate(movablesFn);
+    animations.iterate(animationsFn);
+    renderables.iterate(renderablesFn);
+  };
+}
diff --git a/src/index.js b/src/index.js
index 7439308..60a82f5 100644
--- a/src/index.js
+++ b/src/index.js
@@ -6,6 +6,7 @@ import * as flock_ecs from "./cases/flock-ecs.js";
 import * as geotic from "./cases/geotic.js";
 import * as goodluck from "./cases/goodluck.js";
 import * as jakeklassen__ecs from "./cases/jakeklassen__ecs.js";
+import * as js13k_ecs from "./cases/js13k-ecs.js";
 import * as makr from "./cases/makr.js";
 import * as perform_ecs from "./cases/perform-ecs.js";
 import * as picoes from "./cases/picoes.js";
@@ -28,6 +29,7 @@ add_implementation(ent_comp);
 add_implementation(flock_ecs);
 add_implementation(geotic);
 add_implementation(goodluck);
+add_implementation(js13k_ecs);
 add_implementation(makr);
 add_implementation(perform_ecs);
 add_implementation(picoes);
diff --git a/yarn.lock b/yarn.lock
index 5e10af5..cabd754 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -53,6 +53,11 @@ goodluck@^5.2.0:
   resolved "https://registry.yarnpkg.com/goodluck/-/goodluck-5.2.0.tgz#8f06ca10318292af75fb2e0ffa7a332f640553d6"
   integrity sha512-DzPuYxSuVObwbpyjKMYbMRucfcn6pt8HQSLEU5zPEp7twN6C7LlhUdOBVQTd48WHCCBgSH+WJr8XO8Pxc2JCyQ==
 
+js13k-ecs@^0.1.4:
+  version "0.1.4"
+  resolved "https://registry.yarnpkg.com/js13k-ecs/-/js13k-ecs-0.1.4.tgz#680b1f37c6f898f8e704232678507bbb08677717"
+  integrity sha512-F/OgEkkKMIyZ4b5znThA72oqQDusYFB9m3GZOhjXR2yHR3U6me7363Dc80gM+g3kz9gajhEe3adMstefNeGbqw==
+
 kleur@^4.1.4:
   version "4.1.4"
   resolved "https://registry.yarnpkg.com/kleur/-/kleur-4.1.4.tgz#8c202987d7e577766d039a8cd461934c01cda04d"