The Sleeping Engine
Wake a forgotten machine
$3.99 · Designed for iPad. Not verified for macOS.
A puzzle game with no instructions. Route light through 100 chambers, work out what each carved dream does, and build the shortest machine that wakes the gates.
A forgotten machine sleeps under the stones. Wake it.
The Sleeping Engine is a puzzle game that never tells you the rules. A source sends out signals. Gates across the chamber want them in a certain shape, colour and strength. The carved pieces in your palette change a signal as it passes, and what each one does, you find out by trying it.
Lay pipes, place the carved dreams, turn them, and watch the engine run. When every gate is fed at the same time, the chamber wakes.
100 CHAMBERS
Ten worlds of ten chambers, each world with its own scenery and key. Every chamber brings a new dream or a new twist on one you already know. Later chambers leave room for several working machines, and the top score goes to the one built from the fewest pieces.
A MACHINE THAT PLAYS MUSIC
Turn the sound on and every dream has its own voice. As signals pass, the machine plays in the chamber's key, and each chamber draws a new mood. A working machine is also a small piece of music.
KEEP NOTES
Write down what you think each dream does. Every player starts with the same meanings. Wake all 100 chambers and the dreams trade places: every symbol does something new, and you read them again from scratch.
HINTS WHEN YOU'RE STUCK
Hints are unlimited. One shows the shortest solution for a few seconds and costs that chamber 25 points.
ALSO
- Random experiments at five difficulty levels, with no score
- Free play once the campaign is done: every dream, no walls
- Game Center leaderboards and achievements
- Progress follows you to your other devices through iCloud
- Four looks, among them a colourblind theme with labels and a light theme
- No ads, no in-app purchases, no account
FOR MUSICIANS
The app also adds two Audio Unit plugins for hosts such as AUM. One sends the board's notes out as MIDI, the other plays the game's own sound in time with your host.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Tanel Teemusk, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Tanel Teemusk
- Size
- 51 MB
- Category
- Puzzle
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Tanel Teemusk
