🟪
LIVE DEMO
Tetromino Drop
Fill the bottom row
↑ This is exactly what your users will see
15s
Avg solve time
Medium
Difficulty
Pay what you want
Price
About this game
Place the falling pieces to complete the bottom row. Every board is solvable — if you're human.
Bot-proofMobile friendlyNo cookiesGDPR safeHigh-security forms
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All 18 games
Full pack available
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- ✓ Lifetime access
- ✓ Unlimited domains
- ✓ API + embed code
- ✓ Dashboard & site key
Embed code
index.html
<!-- 1. Add the script -->
<script src="https://captchakit.com/embed.js" async></script>
<!-- 2. Drop in the widget -->
<div
id="gc-widget"
data-game="tetrodrop"
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://captchakit.com/api/verify', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Authorization': 'Bearer YOUR_API_KEY',
},
body: JSON.stringify({
token: req.body.token,
siteKey: 'gc_tetrodrop_xxxx',
}),
});
const { success, gameId } = await res.json();
// success === true means a real human passed the Tetromino Drop challenge