Help & Support
How do I play?
- Tap a screw whose colour matches one of the open tray slots at the bottom. Rivet catches it and drops it in.
- Three screws of a colour fill a slot. The slot closes and the next colour in the queue opens (the little dots next to the tray show what is coming).
- A screw that matches nothing goes into a grey holding cup. When its colour opens later, it jumps into the slot by itself.
- A plank with no screws left falls away and shows what was hiding under it. Faint dashed “ghost” screws on a plank are screws underneath — free the plank on top first.
- Clear every plank and the cage opens: the critter is free!
I'm stuck — all the cups are full
That means every holding cup is taken and no screw you can reach matches an open slot. Tap Undo (the arrow at the top; it is free and unlimited) and try a different order. Every contraption in the game is proven solvable by a solver with one cup fewer than you get, so there is always a way. The 💡 bulb highlights a safe screw if you want a nudge — using it costs a star for that level.
How do I get 3 stars?
Clear the contraption without using a hint and without ever filling the last holding cup. Two stars: no hints. One star: cleared with a hint.
What are the shapes on the screws?
Every colour has its own symbol (teal circle, copper square, sunny triangle, coral diamond, plum star, sky cross, lime heart, pink hexagon) so the game works without relying on colour alone. Turn them off in ⚙️ Settings → Colour symbols if you prefer plain screws.
How does the Daily contraption work?
- Tap the Daily banner on the home screen. Everyone in the world gets the same contraption that day.
- A new one arrives at midnight UTC. Your streak goes up the first time you finish each day's puzzle; miss a day and the next finish starts a new streak at 1.
- The Daily is built and proven on your device from the date. Nothing is downloaded and nothing is sent anywhere.
What is the Zen workshop?
Contraption after contraption with unlimited holding cups, so you can never get stuck. There are no stars in Zen — it is for unwinding. Your best run is saved on your device.
What is Rivet's dam?
Every screw you free and every plank you drop goes into Rivet's river. Tap the 🪵 counter on the home screen to see the dam grow through ten stages — first logs, a low wall, mud, a flag, a beaver pond, Rivet's lodge, a lantern, a water wheel, the friends' bridge and fairy lights. Pieces are earned only by playing; nothing is for sale.
How do I get new wood sets?
Collect stars. Honey oak, cherry, candy stripe, frosted and galaxy planks unlock at 12, 30, 60, 100 and 160 stars. Pick one from the Woods button on the home screen.
The music or sound is off
Open ⚙️ Settings on the home screen and switch Sound effects and Music on. On iPhone, sound plays even with the silent switch on.
Does the game collect anything?
No. There are no accounts, no ads and no personal data. Progress, streaks and settings are saved on your device only. See our privacy policy.
Contact us
Email [email protected] — we read everything.