🧱
LIVE DEMO
Stack It
Stack 3 blocks to pass
Security CheckSTACK IT
0/5
Tap anywhere to drop
↑ This is exactly what your users will see
10s
Avg solve time
Easy
Difficulty
Pay what you want
Price
About this game
Time your taps to stack three blocks without toppling the tower. Precision required.
Bot-proofMobile friendlyNo cookiesGDPR safeComment forms
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Your price
All 7 games
Full pack available
Pay what you want →
- ✓ Lifetime access
- ✓ Unlimited domains
- ✓ API + embed code
- ✓ Dashboard & site key
Embed code
index.html
<!-- 1. Add the script -->
<script src="https://didyu.app/captchagames/embed.js" async></script>
<!-- 2. Drop in the widget -->
<div
id="gc-widget"
data-game="stackit"
data-site-key="YOUR_SITE_KEY"
></div>
<!-- 3. Verify on your server -->
<script>
document.getElementById('gc-widget').addEventListener('gc:pass', async (e) => {
const res = await fetch('/api/verify-captcha', {
method: 'POST',
body: JSON.stringify({ token: e.detail.token }),
});
const { success } = await res.json();
if (success) submitForm();
});
</script>Server verification
server.js
// Server-side token verification
const res = await fetch('https://didyu.app/captchagames/api/verify', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Authorization': 'Bearer YOUR_API_KEY',
},
body: JSON.stringify({
token: req.body.token,
siteKey: 'gc_stackit_xxxx',
}),
});
const { success, gameId } = await res.json();
// success === true means a real human passed the Stack It challenge