Every score is replay-verified: the server re-runs
your machine and scores it on parts used and how quickly the
contraption completes.
Pick an inventor name
Shown on the leaderboard. No account, no email — just a
nickname. 2–14 letters.
🎯 Challenges
Play a friend's machine, or build one of your own.
Every published challenge is verified solvable.
Share it
IT WORKS!
Machine Complete!
⚙️⚙️🔩
The Reub Goldberg
Reuben's Marvelous Machines
Build wonderfully silly contraptions — ramps, trampolines, fans,
balloons, seesaws and more — to solve each puzzle. Inspired by the classic
The Incredible Machine.