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The project file of Gema Lembah costs US$59. Use the "Buy project file" section on this page to pay online or order via WhatsApp; bundle discounts apply when you buy several games.

Cerdas Inovasi DigitalSoftware Developer ~ Custom ServicesTraining ~ Established since 1995

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Gema Lembah

Shout across the gorge, time the echo, work out the distance, then build the rope bridge

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Gema Lembah is a science puzzle game: a little explorer stands at the edge of a gorge and needs to get across. Players shout "HELLO!", read the stopwatch until the echo comes back, then work out the width of the gap with distance = speed × time ÷ 2 before building a rope bridge of exactly the right length. Twenty stages span four worlds, from Green Valley and Red Canyon, where a rock pillar bounces back a double echo, to the freezing Snow Peak and Dusk Desert with its manual stopwatch. Every stage ends with a "Did You Know?" card, so the game is fun to play while explaining the science of sound correctly. It is easy to re-skin with the theme, characters and lesson material a school or ordering brand needs. Try it right here below, then picture a game like this featuring your brand’s logo, characters and prizes.

Play It Now

Tap SHOUT and read the stopwatch · drag or use −/+ for bridge length · BUILD · keyboard: SPACE shout, ←→↑↓ length, ENTER build, H hint

Play Full Screen (best on phones)

Rotate your phone to landscape for the best experience.
Add to Home Screen from your browser menu for quick access.

Game Info

CategoryPuzzle Game
ThemeScience & Technology
LanguageID · EN

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Gameplay

20 stages across 4 themed worlds (Green Valley, Red Canyon, Snow Peak, Dusk Desert) with changing backdrops, colours and music
Real echoes: sound waves travel across the screen in slow motion, bounce off the cliff and rock pillar, and the time shows on the stopwatch
Layered science challenges: a 340 m/s speed of sound, double echoes, the effect of air temperature (v = 331 + 0.6 × T), and manual timing that must be repeated and averaged
20 "Did You Know?" cards, step-by-step hints, three tries per stage, star ratings, and scores saved on the device

Production Quality

Original graphics, characters, music and sound effects created by our team
Plays instantly on phones, tablets and laptops with nothing to install, lightweight and smooth at 60 fps
Touch and keyboard controls, with high scores and progress saved on the device
Available in Indonesian and English

Order One for Your Brand

Swap the explorer, gorge and bridge for your mascot, product or brand setting; the puzzles and fact cards can carry lesson material or a campaign message
Ideal for school learning tools, science museums, education fairs, and brands that want to look smart and fun
Add online leaderboards, coupons or prizes, QR codes for events and visitor data forms
Fast turnaround from concept to launch, including setup on your website or app

Play Gema Lembah Online for Free on Phone and Laptop

Gema Lembah is a sound and echo science puzzle game you can play online for free right in your browser, with no download and no app to install. It runs smoothly on Android phones, iPhones, tablets, laptops and PCs, so it is perfect for a quick break at any time. The difficulty rises step by step, welcoming for beginners yet still challenging for experienced players. Gema Lembah is developed by PT Cerdas Inovasi Digital, a game development studio in Indonesia, and can be customised for brand promotions, events and education.

Play Full Screen

Frequently Asked Questions about Gema Lembah

Is Gema Lembah free?

Yes. Gema Lembah is free to play online in your browser, with no download and no sign-up needed.

Can I play Gema Lembah on my phone?

Yes. It runs in the browser on phones, tablets and laptops. On a phone, use the full screen button and rotate to landscape if the game needs more room.

How do I play Gema Lembah?

Tap SHOUT and read the stopwatch · drag or use −/+ for bridge length · BUILD · keyboard: SPACE shout, ←→↑↓ length, ENTER build, H hint

How many levels does Gema Lembah have?

Gema Lembah is built in progressive steps, with the difficulty rising as you play. Category: Puzzle Game.

Can I order a version with my own brand?

Buy the Gema Lembah Project Files

Get the full game to learn from, customise for your brand or publish on your own site.

Complete source code (HTML5 Canvas + JavaScript), no libraries or build step needed
All levels, graphics, music and sound effects included, ready to run in any modern browser
A short guide to changing texts, colours and difficulty and putting the game on your own website

Instant download after payment · secure checkout by PayPal · Buy 3+ games together and save up to 30%

Want a game like this for your brand?

We design and build custom games for event activations, booths, campaigns and education, complete with your logo, mascot, prizes and leaderboards. Besides web (HTML5), we can build it in the format you need: Unity, Unreal Engine, Godot, an Android/iOS app, a desktop (Windows/Mac) game, a touchscreen kiosk, WebGL 3D, or AR/VR. Tell us your idea and we will send a concept and quote.

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