⚔️ Challenge a Friend
Create a challenge, send the link, and settle who really knows their stuff.
1 · Create your challenge
Pick the lab, add your name and your score — the link you share will show your result and let a friend beat it.
2 · Send the link
Share this link — your friend opens it, plays the lab, and submits their score. You'll both see the real result.
Results are stored live — when your friend submits their score, the head-to-head is final and shareable.