Two Player 2048: Race w/ Friends!
Fork the repl, and share the link with a friend to race in 2048, side-by-side!
If you're intereseted in learning how it's built, check out the guide I shared: https://repl.it/talk/announcements/Multiplayer-2048-Race-with-your-friends/5469
A very cool concept, and appears well executed.
A tip I've learnt from this competition: you would have undoubtedly got many more votes had you posted it earlier.